diff --git a/blockly_compressed.js b/blockly_compressed.js
index f2a885418..e97214e73 100644
--- a/blockly_compressed.js
+++ b/blockly_compressed.js
@@ -1089,9 +1089,9 @@ Blockly.BlockSvg.prototype.moveConnections_=function(a,b){if(this.rendered){for(
 Blockly.BlockSvg.prototype.onMouseMove_=function(a){var b=this,c=this.workspace;Blockly.doCommand(function(){if(!("mousemove"==a.type&&1>=a.clientX&&0==a.clientY&&0==a.button)){Blockly.removeAllRanges();var d=b.getRelativeToSurfaceXY(),e=c.moveDrag(a),f=b.getSvgRoot();1==Blockly.dragMode_&&goog.math.Coordinate.distance(d,e)*c.scale>Blockly.DRAG_RADIUS&&(Blockly.dragMode_=2,Blockly.longStop_(),f.translate_="",f.skew_="",b.parentBlock_&&(b.setParent(null),b.disconnectUiEffect()),b.setDragging_(!0),
 c.recordDeleteAreas());if(2==Blockly.dragMode_){var g=d.x-b.dragStartXY_.x,d=d.y-b.dragStartXY_.y;f.translate_="translate("+e.x+","+e.y+")";f.setAttribute("transform",f.translate_+f.skew_);for(e=0;e<b.draggedBubbles_.length;e++)f=b.draggedBubbles_[e],f.bubble.setIconLocation(f.x+g,f.y+d);for(var f=b.getConnections_(!1),h=null,k=null,l=Blockly.SNAP_RADIUS,e=0;e<f.length;e++){var q=f[e],m=q.closest(l,g,d);m.connection&&(h=m.connection,k=q,l=m.radius)}Blockly.highlightedConnection_&&Blockly.highlightedConnection_!=
 h&&(Blockly.highlightedConnection_.unhighlight(),Blockly.highlightedConnection_=null,Blockly.localConnection_=null);h&&h!=Blockly.highlightedConnection_&&(h.highlight(),Blockly.highlightedConnection_=h,Blockly.localConnection_=k);b.isDeletable()&&c.isDeleteArea(a)}}a.stopPropagation()})};Blockly.BlockSvg.prototype.updateMovable=function(){this.isMovable()?Blockly.addClass_(this.svgGroup_,"blocklyDraggable"):Blockly.removeClass_(this.svgGroup_,"blocklyDraggable")};
-Blockly.BlockSvg.prototype.setMovable=function(a){Blockly.BlockSvg.superClass_.setMovable.call(this,a);this.updateMovable()};Blockly.BlockSvg.prototype.setEditable=function(a){Blockly.BlockSvg.superClass_.setEditable.call(this,a);if(this.rendered)for(a=0;a<this.icons_.length;a++)this.icons_[a].updateEditable()};Blockly.BlockSvg.prototype.getSvgRoot=function(){return this.svgGroup_};Blockly.BlockSvg.SEP_SPACE_X=10;Blockly.BlockSvg.SEP_SPACE_Y=10;Blockly.BlockSvg.INLINE_PADDING_Y=5;
-Blockly.BlockSvg.MIN_BLOCK_Y=25;Blockly.BlockSvg.TAB_HEIGHT=20;Blockly.BlockSvg.TAB_WIDTH=8;Blockly.BlockSvg.NOTCH_WIDTH=30;Blockly.BlockSvg.CORNER_RADIUS=8;Blockly.BlockSvg.START_HAT=!1;Blockly.BlockSvg.START_HAT_PATH="c 30,-15 70,-15 100,0";Blockly.BlockSvg.START_HAT_HIGHLIGHT_LTR="c 17.8,-9.2 45.3,-14.9 75,-8.7 M 100.5,0.5";Blockly.BlockSvg.START_HAT_HIGHLIGHT_RTL="m 25,-8.7 c 29.7,-6.2 57.2,-0.5 75,8.7";Blockly.BlockSvg.DISTANCE_45_INSIDE=(1-Math.SQRT1_2)*(Blockly.BlockSvg.CORNER_RADIUS-.5)+.5;
-Blockly.BlockSvg.DISTANCE_45_OUTSIDE=(1-Math.SQRT1_2)*(Blockly.BlockSvg.CORNER_RADIUS+.5)-.5;Blockly.BlockSvg.NOTCH_PATH_LEFT="l 6,4 3,0 6,-4";Blockly.BlockSvg.NOTCH_PATH_LEFT_HIGHLIGHT="l 6,4 3,0 6,-4";Blockly.BlockSvg.NOTCH_PATH_RIGHT="l -6,4 -3,0 -6,-4";Blockly.BlockSvg.JAGGED_TEETH="l 8,0 0,4 8,4 -16,8 8,4";Blockly.BlockSvg.JAGGED_TEETH_HEIGHT=20;Blockly.BlockSvg.JAGGED_TEETH_WIDTH=15;
+Blockly.BlockSvg.prototype.setMovable=function(a){Blockly.BlockSvg.superClass_.setMovable.call(this,a);this.updateMovable()};Blockly.BlockSvg.prototype.setEditable=function(a){Blockly.BlockSvg.superClass_.setEditable.call(this,a);if(this.rendered)for(a=0;a<this.icons_.length;a++)this.icons_[a].updateEditable()};Blockly.BlockSvg.prototype.setShadow=function(a){Blockly.BlockSvg.superClass_.setShadow.call(this,a);this.updateColour()};Blockly.BlockSvg.prototype.getSvgRoot=function(){return this.svgGroup_};
+Blockly.BlockSvg.SEP_SPACE_X=10;Blockly.BlockSvg.SEP_SPACE_Y=10;Blockly.BlockSvg.INLINE_PADDING_Y=5;Blockly.BlockSvg.MIN_BLOCK_Y=25;Blockly.BlockSvg.TAB_HEIGHT=20;Blockly.BlockSvg.TAB_WIDTH=8;Blockly.BlockSvg.NOTCH_WIDTH=30;Blockly.BlockSvg.CORNER_RADIUS=8;Blockly.BlockSvg.START_HAT=!1;Blockly.BlockSvg.START_HAT_PATH="c 30,-15 70,-15 100,0";Blockly.BlockSvg.START_HAT_HIGHLIGHT_LTR="c 17.8,-9.2 45.3,-14.9 75,-8.7 M 100.5,0.5";Blockly.BlockSvg.START_HAT_HIGHLIGHT_RTL="m 25,-8.7 c 29.7,-6.2 57.2,-0.5 75,8.7";
+Blockly.BlockSvg.DISTANCE_45_INSIDE=(1-Math.SQRT1_2)*(Blockly.BlockSvg.CORNER_RADIUS-.5)+.5;Blockly.BlockSvg.DISTANCE_45_OUTSIDE=(1-Math.SQRT1_2)*(Blockly.BlockSvg.CORNER_RADIUS+.5)-.5;Blockly.BlockSvg.NOTCH_PATH_LEFT="l 6,4 3,0 6,-4";Blockly.BlockSvg.NOTCH_PATH_LEFT_HIGHLIGHT="l 6,4 3,0 6,-4";Blockly.BlockSvg.NOTCH_PATH_RIGHT="l -6,4 -3,0 -6,-4";Blockly.BlockSvg.JAGGED_TEETH="l 8,0 0,4 8,4 -16,8 8,4";Blockly.BlockSvg.JAGGED_TEETH_HEIGHT=20;Blockly.BlockSvg.JAGGED_TEETH_WIDTH=15;
 Blockly.BlockSvg.TAB_PATH_DOWN="v 5 c 0,10 -"+Blockly.BlockSvg.TAB_WIDTH+",-8 -"+Blockly.BlockSvg.TAB_WIDTH+",7.5 s "+Blockly.BlockSvg.TAB_WIDTH+",-2.5 "+Blockly.BlockSvg.TAB_WIDTH+",7.5";Blockly.BlockSvg.TAB_PATH_DOWN_HIGHLIGHT_RTL="v 6.5 m -"+.97*Blockly.BlockSvg.TAB_WIDTH+",3 q -"+.05*Blockly.BlockSvg.TAB_WIDTH+",10 "+.3*Blockly.BlockSvg.TAB_WIDTH+",9.5 m "+.67*Blockly.BlockSvg.TAB_WIDTH+",-1.9 v 1.4";Blockly.BlockSvg.TOP_LEFT_CORNER_START="m 0,"+Blockly.BlockSvg.CORNER_RADIUS;
 Blockly.BlockSvg.TOP_LEFT_CORNER_START_HIGHLIGHT_RTL="m "+Blockly.BlockSvg.DISTANCE_45_INSIDE+","+Blockly.BlockSvg.DISTANCE_45_INSIDE;Blockly.BlockSvg.TOP_LEFT_CORNER_START_HIGHLIGHT_LTR="m 0.5,"+(Blockly.BlockSvg.CORNER_RADIUS-.5);Blockly.BlockSvg.TOP_LEFT_CORNER="A "+Blockly.BlockSvg.CORNER_RADIUS+","+Blockly.BlockSvg.CORNER_RADIUS+" 0 0,1 "+Blockly.BlockSvg.CORNER_RADIUS+",0";
 Blockly.BlockSvg.TOP_LEFT_CORNER_HIGHLIGHT="A "+(Blockly.BlockSvg.CORNER_RADIUS-.5)+","+(Blockly.BlockSvg.CORNER_RADIUS-.5)+" 0 0,1 "+Blockly.BlockSvg.CORNER_RADIUS+",0.5";Blockly.BlockSvg.INNER_TOP_LEFT_CORNER=Blockly.BlockSvg.NOTCH_PATH_RIGHT+" h -"+(Blockly.BlockSvg.NOTCH_WIDTH-15-Blockly.BlockSvg.CORNER_RADIUS)+" h -0.5 a "+Blockly.BlockSvg.CORNER_RADIUS+","+Blockly.BlockSvg.CORNER_RADIUS+" 0 0,0 -"+Blockly.BlockSvg.CORNER_RADIUS+","+Blockly.BlockSvg.CORNER_RADIUS;
@@ -1143,7 +1143,7 @@ Blockly.FieldTextInput.prototype.setText=function(a){if(null!==a){if(this.source
 Blockly.FieldTextInput.prototype.showEditor_=function(a){var b=a||!1;if(!b&&(goog.userAgent.MOBILE||goog.userAgent.ANDROID||goog.userAgent.IPAD))a=window.prompt(Blockly.Msg.CHANGE_VALUE_TITLE,this.text_),this.sourceBlock_&&this.changeHandler_&&(b=this.changeHandler_(a),void 0!==b&&(a=b)),null!==a&&this.setText(a);else{Blockly.WidgetDiv.show(this,this.sourceBlock_.RTL,this.widgetDispose_());var c=Blockly.WidgetDiv.DIV;a=goog.dom.createDom("input","blocklyHtmlInput");a.setAttribute("spellcheck",this.spellcheck_);
 var d=Blockly.FieldTextInput.FONTSIZE*this.sourceBlock_.workspace.scale+"pt";c.style.fontSize=d;a.style.fontSize=d;Blockly.FieldTextInput.htmlInput_=a;c.appendChild(a);a.value=a.defaultValue=this.text_;a.oldValue_=null;this.validate_();this.resizeEditor_();b||(a.focus(),a.select());a.onKeyDownWrapper_=Blockly.bindEvent_(a,"keydown",this,this.onHtmlInputKeyDown_);a.onKeyUpWrapper_=Blockly.bindEvent_(a,"keyup",this,this.onHtmlInputChange_);a.onKeyPressWrapper_=Blockly.bindEvent_(a,"keypress",this,this.onHtmlInputChange_);
 b=this.sourceBlock_.workspace.getCanvas();a.onWorkspaceChangeWrapper_=Blockly.bindEvent_(b,"blocklyWorkspaceChange",this,this.resizeEditor_)}};Blockly.FieldTextInput.prototype.onHtmlInputKeyDown_=function(a){var b=Blockly.FieldTextInput.htmlInput_;13==a.keyCode?Blockly.WidgetDiv.hide():27==a.keyCode?(this.setText(b.defaultValue),Blockly.WidgetDiv.hide()):9==a.keyCode&&(Blockly.WidgetDiv.hide(),this.sourceBlock_.tab(this,!a.shiftKey),a.preventDefault())};
-Blockly.FieldTextInput.prototype.onHtmlInputChange_=function(a){var b=Blockly.FieldTextInput.htmlInput_;27!=a.keyCode&&(a=b.value,a!==b.oldValue_?(b.oldValue_=a,this.setText(a),this.validate_()):goog.userAgent.WEBKIT&&this.sourceBlock_.render())};
+Blockly.FieldTextInput.prototype.onHtmlInputChange_=function(a){var b=Blockly.FieldTextInput.htmlInput_;27!=a.keyCode&&(a=b.value,a!==b.oldValue_?(this.sourceBlock_.setShadow(!1),b.oldValue_=a,this.setText(a),this.validate_()):goog.userAgent.WEBKIT&&this.sourceBlock_.render())};
 Blockly.FieldTextInput.prototype.validate_=function(){var a=!0;goog.asserts.assertObject(Blockly.FieldTextInput.htmlInput_);var b=Blockly.FieldTextInput.htmlInput_;this.sourceBlock_&&this.changeHandler_&&(a=this.changeHandler_(b.value));null===a?Blockly.addClass_(b,"blocklyInvalidInput"):Blockly.removeClass_(b,"blocklyInvalidInput")};
 Blockly.FieldTextInput.prototype.resizeEditor_=function(){var a=Blockly.WidgetDiv.DIV,b=this.fieldGroup_.getBBox();a.style.width=b.width*this.sourceBlock_.workspace.scale+"px";a.style.height=b.height*this.sourceBlock_.workspace.scale+"px";b=this.getAbsoluteXY_();if(this.sourceBlock_.RTL){var c=this.getScaledBBox_();b.x+=c.width;b.x-=a.offsetWidth}b.y+=1;goog.userAgent.GECKO&&Blockly.WidgetDiv.DIV.style.top&&(--b.x,--b.y);goog.userAgent.WEBKIT&&(b.y-=3);a.style.left=b.x+"px";a.style.top=b.y+"px"};
 Blockly.FieldTextInput.prototype.widgetDispose_=function(){var a=this;return function(){var b=Blockly.FieldTextInput.htmlInput_,c=b.value;if(a.sourceBlock_&&a.changeHandler_){var d=a.changeHandler_(c);null===d?c=b.defaultValue:void 0!==d&&(c=d)}a.setText(c);a.sourceBlock_.rendered&&a.sourceBlock_.render();Blockly.unbindEvent_(b.onKeyDownWrapper_);Blockly.unbindEvent_(b.onKeyUpWrapper_);Blockly.unbindEvent_(b.onKeyPressWrapper_);Blockly.unbindEvent_(b.onWorkspaceChangeWrapper_);Blockly.FieldTextInput.htmlInput_=
@@ -1158,19 +1158,19 @@ Blockly.FieldAngle.prototype.setText=function(a){Blockly.FieldAngle.superClass_.
 Blockly.FieldAngle.prototype.updateGraph_=function(){if(this.gauge_){var a=goog.math.toRadians(Number(this.getText()));if(isNaN(a))this.gauge_.setAttribute("d","M "+Blockly.FieldAngle.HALF+","+Blockly.FieldAngle.HALF),this.line_.setAttribute("x2",Blockly.FieldAngle.HALF),this.line_.setAttribute("y2",Blockly.FieldAngle.HALF);else{var b=Blockly.FieldAngle.HALF+Math.cos(a)*Blockly.FieldAngle.RADIUS,c=Blockly.FieldAngle.HALF+Math.sin(a)*-Blockly.FieldAngle.RADIUS;this.gauge_.setAttribute("d","M "+Blockly.FieldAngle.HALF+
 ","+Blockly.FieldAngle.HALF+" h "+Blockly.FieldAngle.RADIUS+" A "+Blockly.FieldAngle.RADIUS+","+Blockly.FieldAngle.RADIUS+" 0 "+(a>Math.PI?1:0)+" 0 "+b+","+c+" z");this.line_.setAttribute("x2",b);this.line_.setAttribute("y2",c)}}};Blockly.FieldAngle.angleValidator=function(a){a=Blockly.FieldTextInput.numberValidator(a);null!==a&&(a%=360,0>a&&(a+=360),a=String(a));return a};Blockly.FieldCheckbox=function(a,b){Blockly.FieldCheckbox.superClass_.constructor.call(this,"");this.setChangeHandler(b);this.setValue(a)};goog.inherits(Blockly.FieldCheckbox,Blockly.Field);Blockly.FieldCheckbox.prototype.CURSOR="default";
 Blockly.FieldCheckbox.prototype.init=function(a){this.sourceBlock_||(Blockly.FieldCheckbox.superClass_.init.call(this,a),this.checkElement_=Blockly.createSvgElement("text",{"class":"blocklyText",x:-3,y:14},this.fieldGroup_),a=document.createTextNode("\u2713"),this.checkElement_.appendChild(a),this.checkElement_.style.display=this.state_?"block":"none")};Blockly.FieldCheckbox.prototype.getValue=function(){return String(this.state_).toUpperCase()};
-Blockly.FieldCheckbox.prototype.setValue=function(a){a="TRUE"==a;this.state_!==a&&(this.state_=a,this.checkElement_&&(this.checkElement_.style.display=a?"block":"none"),this.sourceBlock_&&this.sourceBlock_.rendered&&this.sourceBlock_.workspace.fireChangeEvent())};Blockly.FieldCheckbox.prototype.showEditor_=function(){var a=!this.state_;if(this.sourceBlock_&&this.changeHandler_){var b=this.changeHandler_(a);void 0!==b&&(a=b)}null!==a&&this.setValue(String(a).toUpperCase())};Blockly.FieldColour=function(a,b){Blockly.FieldColour.superClass_.constructor.call(this,"\u00a0\u00a0\u00a0");this.setChangeHandler(b);this.setValue(a)};goog.inherits(Blockly.FieldColour,Blockly.Field);Blockly.FieldColour.prototype.colours_=null;Blockly.FieldColour.prototype.columns_=0;Blockly.FieldColour.prototype.init=function(a){Blockly.FieldColour.superClass_.init.call(this,a);this.borderRect_.style.fillOpacity=1;this.setValue(this.getValue())};Blockly.FieldColour.prototype.CURSOR="default";
+Blockly.FieldCheckbox.prototype.setValue=function(a){a="TRUE"==a;this.state_!==a&&(this.state_=a,this.checkElement_&&(this.checkElement_.style.display=a?"block":"none"),this.sourceBlock_&&this.sourceBlock_.rendered&&this.sourceBlock_.workspace.fireChangeEvent())};Blockly.FieldCheckbox.prototype.showEditor_=function(){var a=!this.state_;if(this.sourceBlock_&&this.changeHandler_){var b=this.changeHandler_(a);void 0!==b&&(a=b)}null!==a&&(this.sourceBlock_.setShadow(!1),this.setValue(String(a).toUpperCase()))};Blockly.FieldColour=function(a,b){Blockly.FieldColour.superClass_.constructor.call(this,"\u00a0\u00a0\u00a0");this.setChangeHandler(b);this.setValue(a)};goog.inherits(Blockly.FieldColour,Blockly.Field);Blockly.FieldColour.prototype.colours_=null;Blockly.FieldColour.prototype.columns_=0;Blockly.FieldColour.prototype.init=function(a){Blockly.FieldColour.superClass_.init.call(this,a);this.borderRect_.style.fillOpacity=1;this.setValue(this.getValue())};Blockly.FieldColour.prototype.CURSOR="default";
 Blockly.FieldColour.prototype.dispose=function(){Blockly.WidgetDiv.hideIfOwner(this);Blockly.FieldColour.superClass_.dispose.call(this)};Blockly.FieldColour.prototype.getValue=function(){return this.colour_};Blockly.FieldColour.prototype.setValue=function(a){this.colour_=a;this.borderRect_&&(this.borderRect_.style.fill=a);this.sourceBlock_&&this.sourceBlock_.rendered&&(Blockly.Realtime.blockChanged(this.sourceBlock_),this.sourceBlock_.workspace.fireChangeEvent())};
 Blockly.FieldColour.prototype.getText=function(){var a=this.colour_,b=a.match(/^#(.)\1(.)\2(.)\3$/);b&&(a="#"+b[1]+b[2]+b[3]);return a};Blockly.FieldColour.COLOURS=goog.ui.ColorPicker.SIMPLE_GRID_COLORS;Blockly.FieldColour.COLUMNS=7;Blockly.FieldColour.prototype.setColours=function(a){this.colours_=a;return this};Blockly.FieldColour.prototype.setColumns=function(a){this.columns_=a;return this};
 Blockly.FieldColour.prototype.showEditor_=function(){Blockly.WidgetDiv.show(this,this.sourceBlock_.RTL,Blockly.FieldColour.widgetDispose_);var a=new goog.ui.ColorPicker;a.setSize(this.columns_||Blockly.FieldColour.COLUMNS);a.setColors(this.colours_||Blockly.FieldColour.COLOURS);var b=goog.dom.getViewportSize(),c=goog.style.getViewportPageOffset(document),d=this.getAbsoluteXY_(),e=this.getScaledBBox_();a.render(Blockly.WidgetDiv.DIV);a.setSelectedColor(this.getValue());var f=goog.style.getSize(a.getElement());
 d.y=d.y+f.height+e.height>=b.height+c.y?d.y-(f.height-1):d.y+(e.height-1);this.sourceBlock_.RTL?(d.x+=e.width,d.x-=f.width,d.x<c.x&&(d.x=c.x)):d.x>b.width+c.x-f.width&&(d.x=b.width+c.x-f.width);Blockly.WidgetDiv.position(d.x,d.y,b,c,this.sourceBlock_.RTL);var g=this;Blockly.FieldColour.changeEventKey_=goog.events.listen(a,goog.ui.ColorPicker.EventType.CHANGE,function(a){a=a.target.getSelectedColor()||"#000000";Blockly.WidgetDiv.hide();if(g.sourceBlock_&&g.changeHandler_){var b=g.changeHandler_(a);
-void 0!==b&&(a=b)}null!==a&&g.setValue(a)})};Blockly.FieldColour.widgetDispose_=function(){Blockly.FieldColour.changeEventKey_&&goog.events.unlistenByKey(Blockly.FieldColour.changeEventKey_)};Blockly.FieldDropdown=function(a,b){this.menuGenerator_=a;this.setChangeHandler(b);this.trimOptions_();var c=this.getOptions_()[0];this.value_=c[1];Blockly.FieldDropdown.superClass_.constructor.call(this,c[0])};goog.inherits(Blockly.FieldDropdown,Blockly.Field);Blockly.FieldDropdown.CHECKMARK_OVERHANG=25;Blockly.FieldDropdown.ARROW_CHAR=goog.userAgent.ANDROID?"\u25bc":"\u25be";Blockly.FieldDropdown.prototype.CURSOR="default";
+void 0!==b&&(a=b)}null!==a&&(g.sourceBlock_.setShadow(!1),g.setValue(a))})};Blockly.FieldColour.widgetDispose_=function(){Blockly.FieldColour.changeEventKey_&&goog.events.unlistenByKey(Blockly.FieldColour.changeEventKey_)};Blockly.FieldDropdown=function(a,b){this.menuGenerator_=a;this.setChangeHandler(b);this.trimOptions_();var c=this.getOptions_()[0];this.value_=c[1];Blockly.FieldDropdown.superClass_.constructor.call(this,c[0])};goog.inherits(Blockly.FieldDropdown,Blockly.Field);Blockly.FieldDropdown.CHECKMARK_OVERHANG=25;Blockly.FieldDropdown.ARROW_CHAR=goog.userAgent.ANDROID?"\u25bc":"\u25be";Blockly.FieldDropdown.prototype.CURSOR="default";
 Blockly.FieldDropdown.prototype.init=function(a){this.sourceBlock_||(this.arrow_=Blockly.createSvgElement("tspan",{},null),this.arrow_.appendChild(document.createTextNode(a.RTL?Blockly.FieldDropdown.ARROW_CHAR+" ":" "+Blockly.FieldDropdown.ARROW_CHAR)),Blockly.FieldDropdown.superClass_.init.call(this,a),a=this.text_,this.text_=null,this.setText(a))};
 Blockly.FieldDropdown.prototype.showEditor_=function(){Blockly.WidgetDiv.show(this,this.sourceBlock_.RTL,null);var a=this,b=new goog.ui.Menu;b.setRightToLeft(this.sourceBlock_.RTL);for(var c=this.getOptions_(),d=0;d<c.length;d++){var e=c[d][1],f=new goog.ui.MenuItem(c[d][0]);f.setRightToLeft(this.sourceBlock_.RTL);f.setValue(e);f.setCheckable(!0);b.addChild(f,!0);f.setChecked(e==this.value_)}goog.events.listen(b,goog.ui.Component.EventType.ACTION,function(b){if(b=b.target){b=b.getValue();if(a.sourceBlock_&&
-a.changeHandler_){var c=a.changeHandler_(b);void 0!==c&&(b=c)}null!==b&&a.setValue(b)}Blockly.WidgetDiv.hideIfOwner(a)});b.getHandler().listen(b.getElement(),goog.events.EventType.TOUCHSTART,function(a){this.getOwnerControl(a.target).handleMouseDown(a)});b.getHandler().listen(b.getElement(),goog.events.EventType.TOUCHEND,function(a){this.getOwnerControl(a.target).performActionInternal(a)});c=goog.dom.getViewportSize();d=goog.style.getViewportPageOffset(document);e=this.getAbsoluteXY_();f=this.getScaledBBox_();
-b.render(Blockly.WidgetDiv.DIV);var g=b.getElement();Blockly.addClass_(g,"blocklyDropdownMenu");var h=goog.style.getSize(g);h.height=g.scrollHeight;e.y=e.y+h.height+f.height>=c.height+d.y?e.y-(h.height+2):e.y+f.height;this.sourceBlock_.RTL?(e.x+=f.width,e.x+=Blockly.FieldDropdown.CHECKMARK_OVERHANG,e.x<d.x+h.width&&(e.x=d.x+h.width)):(e.x-=Blockly.FieldDropdown.CHECKMARK_OVERHANG,e.x>c.width+d.x-h.width&&(e.x=c.width+d.x-h.width));Blockly.WidgetDiv.position(e.x,e.y,c,d,this.sourceBlock_.RTL);b.setAllowAutoFocus(!0);
-g.focus()};
-Blockly.FieldDropdown.prototype.trimOptions_=function(){this.suffixField=this.prefixField=null;var a=this.menuGenerator_;if(goog.isArray(a)&&!(2>a.length)){var b=a.map(function(a){return a[0]}),c=Blockly.shortestStringLength(b),d=Blockly.commonWordPrefix(b,c),e=Blockly.commonWordSuffix(b,c);if((d||e)&&!(c<=d+e)){d&&(this.prefixField=b[0].substring(0,d-1));e&&(this.suffixField=b[0].substr(1-e));b=[];for(c=0;c<a.length;c++){var f=a[c][0],g=a[c][1],f=f.substring(d,f.length-e);b[c]=[f,g]}this.menuGenerator_=b}}};
-Blockly.FieldDropdown.prototype.getOptions_=function(){return goog.isFunction(this.menuGenerator_)?this.menuGenerator_.call(this):this.menuGenerator_};Blockly.FieldDropdown.prototype.getValue=function(){return this.value_};Blockly.FieldDropdown.prototype.setValue=function(a){this.value_=a;for(var b=this.getOptions_(),c=0;c<b.length;c++)if(b[c][1]==a){this.setText(b[c][0]);return}this.setText(a)};
+a.changeHandler_){var c=a.changeHandler_(b);void 0!==c&&(b=c)}null!==b&&(a.sourceBlock_.setShadow(!1),a.setValue(b))}Blockly.WidgetDiv.hideIfOwner(a)});b.getHandler().listen(b.getElement(),goog.events.EventType.TOUCHSTART,function(a){this.getOwnerControl(a.target).handleMouseDown(a)});b.getHandler().listen(b.getElement(),goog.events.EventType.TOUCHEND,function(a){this.getOwnerControl(a.target).performActionInternal(a)});c=goog.dom.getViewportSize();d=goog.style.getViewportPageOffset(document);e=this.getAbsoluteXY_();
+f=this.getScaledBBox_();b.render(Blockly.WidgetDiv.DIV);var g=b.getElement();Blockly.addClass_(g,"blocklyDropdownMenu");var h=goog.style.getSize(g);h.height=g.scrollHeight;e.y=e.y+h.height+f.height>=c.height+d.y?e.y-(h.height+2):e.y+f.height;this.sourceBlock_.RTL?(e.x+=f.width,e.x+=Blockly.FieldDropdown.CHECKMARK_OVERHANG,e.x<d.x+h.width&&(e.x=d.x+h.width)):(e.x-=Blockly.FieldDropdown.CHECKMARK_OVERHANG,e.x>c.width+d.x-h.width&&(e.x=c.width+d.x-h.width));Blockly.WidgetDiv.position(e.x,e.y,c,d,this.sourceBlock_.RTL);
+b.setAllowAutoFocus(!0);g.focus()};
+Blockly.FieldDropdown.prototype.trimOptions_=function(){this.suffixField=this.prefixField=null;var a=this.menuGenerator_;if(goog.isArray(a)&&!(2>a.length)){var b=a.map(function(a){return a[0]}),c=Blockly.shortestStringLength(b),d=Blockly.commonWordPrefix(b,c),e=Blockly.commonWordSuffix(b,c);if((d||e)&&!(c<=d+e)){d&&(this.prefixField=b[0].substring(0,d-1));e&&(this.suffixField=b[0].substr(1-e));b=[];for(c=0;c<a.length;c++){var f=a[c][0],g=a[c][1],f=f.substring(d,f.length-e);b[c]=[f,g]}this.menuGenerator_=
+b}}};Blockly.FieldDropdown.prototype.getOptions_=function(){return goog.isFunction(this.menuGenerator_)?this.menuGenerator_.call(this):this.menuGenerator_};Blockly.FieldDropdown.prototype.getValue=function(){return this.value_};Blockly.FieldDropdown.prototype.setValue=function(a){this.value_=a;for(var b=this.getOptions_(),c=0;c<b.length;c++)if(b[c][1]==a){this.setText(b[c][0]);return}this.setText(a)};
 Blockly.FieldDropdown.prototype.setText=function(a){this.sourceBlock_&&this.arrow_&&(this.arrow_.style.fill=Blockly.makeColour(this.sourceBlock_.getColour()));null!==a&&a!==this.text_&&(this.text_=a,this.updateTextNode_(),this.textElement_&&(this.sourceBlock_.RTL?this.textElement_.insertBefore(this.arrow_,this.textElement_.firstChild):this.textElement_.appendChild(this.arrow_)),this.sourceBlock_&&this.sourceBlock_.rendered&&(this.sourceBlock_.render(),this.sourceBlock_.bumpNeighbours_(),this.sourceBlock_.workspace.fireChangeEvent()))};
 Blockly.FieldDropdown.prototype.dispose=function(){Blockly.WidgetDiv.hideIfOwner(this);Blockly.FieldDropdown.superClass_.dispose.call(this)};Blockly.FieldImage=function(a,b,c,d){this.sourceBlock_=null;this.height_=Number(c);this.width_=Number(b);this.size_=new goog.math.Size(this.width_,this.height_+2*Blockly.BlockSvg.INLINE_PADDING_Y);this.text_=d||"";this.setValue(a)};goog.inherits(Blockly.FieldImage,Blockly.Field);Blockly.FieldImage.prototype.rectElement_=null;Blockly.FieldImage.prototype.EDITABLE=!1;
 Blockly.FieldImage.prototype.init=function(a){this.sourceBlock_||(this.sourceBlock_=a,this.fieldGroup_=Blockly.createSvgElement("g",{},null),this.visible_||(this.fieldGroup_.style.display="none"),this.imageElement_=Blockly.createSvgElement("image",{height:this.height_+"px",width:this.width_+"px"},this.fieldGroup_),this.setValue(this.src_),goog.userAgent.GECKO&&(this.rectElement_=Blockly.createSvgElement("rect",{height:this.height_+"px",width:this.width_+"px","fill-opacity":0},this.fieldGroup_)),a.getSvgRoot().appendChild(this.fieldGroup_),
diff --git a/core/block_svg.js b/core/block_svg.js
index 240e31a35..5157b08e9 100644
--- a/core/block_svg.js
+++ b/core/block_svg.js
@@ -843,6 +843,15 @@ Blockly.BlockSvg.prototype.setEditable = function(editable) {
   }
 };
 
+/**
+ * Set whether this block is a shadow block or not.
+ * @param {boolean} shadow True if a shadow.
+ */
+Blockly.BlockSvg.prototype.setShadow = function(shadow) {
+  Blockly.BlockSvg.superClass_.setShadow.call(this, shadow);
+  this.updateColour();
+};
+
 /**
  * Return the root node of the SVG or null if none exists.
  * @return {Element} The root SVG node (probably a group).
diff --git a/core/field_checkbox.js b/core/field_checkbox.js
index 19714322b..c56b2e70e 100644
--- a/core/field_checkbox.js
+++ b/core/field_checkbox.js
@@ -111,6 +111,7 @@ Blockly.FieldCheckbox.prototype.showEditor_ = function() {
     }
   }
   if (newState !== null) {
+    this.sourceBlock_.setShadow(false);
     this.setValue(String(newState).toUpperCase());
   }
 };
diff --git a/core/field_colour.js b/core/field_colour.js
index 6bca8aa97..ebbd46c34 100644
--- a/core/field_colour.js
+++ b/core/field_colour.js
@@ -225,6 +225,7 @@ Blockly.FieldColour.prototype.showEditor_ = function() {
           }
         }
         if (colour !== null) {
+          thisField.sourceBlock_.setShadow(false);
           thisField.setValue(colour);
         }
       });
diff --git a/core/field_dropdown.js b/core/field_dropdown.js
index 7373e4782..4c1f234dd 100644
--- a/core/field_dropdown.js
+++ b/core/field_dropdown.js
@@ -119,6 +119,7 @@ Blockly.FieldDropdown.prototype.showEditor_ = function() {
         }
       }
       if (value !== null) {
+        thisField.sourceBlock_.setShadow(false);
         thisField.setValue(value);
       }
     }
diff --git a/core/field_textinput.js b/core/field_textinput.js
index 41107ea65..a5cac7ebb 100644
--- a/core/field_textinput.js
+++ b/core/field_textinput.js
@@ -195,6 +195,7 @@ Blockly.FieldTextInput.prototype.onHtmlInputChange_ = function(e) {
     // Update source block.
     var text = htmlInput.value;
     if (text !== htmlInput.oldValue_) {
+      this.sourceBlock_.setShadow(false);
       htmlInput.oldValue_ = text;
       this.setText(text);
       this.validate_();