Revert "Don't render children of collapsed blocks (#4264)" (#4300)

This reverts commit 96e8fc794e.

core/block_svg.js

@@ -87,6 +87,7 @@ Blockly.BlockSvg = function(workspace, prototypeName, opt_id) {
    */
   this.renderIsInProgress_ = false;
 
+
   /** @type {!Blockly.WorkspaceSvg} */
   this.workspace = workspace;
 
@@ -642,21 +643,14 @@ Blockly.BlockSvg.prototype.updateCollapsed_ = function() {
   var collapsedInputName = Blockly.Block.COLLAPSED_INPUT_NAME;
   var collapsedFieldName = Blockly.Block.COLLAPSED_FIELD_NAME;
 
-  var renderList = [];
-  // Show/hide the inputs.
   for (var i = 0, input; (input = this.inputList[i]); i++) {
     if (input.name != collapsedInputName) {
-      renderList.push.apply(renderList, input.setVisible(!collapsed));
+      input.setVisible(!collapsed);
     }
   }
 
   if (!collapsed) {
     this.removeInput(collapsedInputName);
-    if (this.rendered) {
-      for (var i = 0, block; (block = renderList[i]); i++) {
-        block.render();
-      }
-    }
     return;
   }
 
@@ -981,9 +975,7 @@ Blockly.BlockSvg.prototype.updateDisabled = function() {
   var children = this.getChildren(false);
   this.applyColour();
   for (var i = 0, child; (child = children[i]); i++) {
-    if (child.rendered) {
-      child.updateDisabled();
-    }
+    child.updateDisabled();
   }
 };
 
@@ -1634,12 +1626,10 @@ Blockly.BlockSvg.prototype.render = function(opt_bubble) {
     if (this.isCollapsed()) {
       this.updateCollapsed_();
     }
-
     this.workspace.getRenderer().render(this);
     this.updateConnectionLocations_();
 
     if (opt_bubble !== false) {
-      // Render all blocks above this one (propogate a reflow).
       var parentBlock = this.getParent();
       if (parentBlock) {
         parentBlock.render(true);