* Change the setting of the CSS transform properties on SVG nodes to set both the unprefixed version and the `-webkit-` prefixed version so that Blockly correctly renders in order browsers, such as Safari < 9 and iOS Safari < 9.2. For discussion of this issue, see https://groups.google.com/forum/#!topic/blockly/o3pERaRQhSg
* Correct the separation between the CSS transform property and the rest of the CSS that was in the variable misleadingly called "transform".
Defer tooltip message string check until after load, when all Blockly.Msg should be loaded.
Avoids validation in headless mode, due to lack of document.readyState.
Moving all `math.js` definitions into a single JSON array, complete with i18n syntax for all messages, dropdowns, and tooltips.
Adding Blockly.Extensions.buildTooltipForDropdown(..) to facilitate the creation and error-checking of tooltips that update based on the value of a dropdown.
Now warn on raw string in JSON 'extensions'.
* Beginnings of a JSON block definition unit test set.
* Dispose of unit test workspaces and blocks in finally blocks.
* Clarify JSON error message by echoing arg notation.
Replaces old colour block definitions with a Blockly.defineBlocksWithJsonArray(..) call. Generator unit tests continue to load and pass, signifying compatibility with prior block definitions.
Replaces extension 'math_number_tooltip' with the reusable 'parent_tooltip_when_inline' extension, also used by colour_picker. Includes tests.
* Add ability to add a class to a scrollbar so that different types of scrollbars can
be distinguished from each other. You used to be able to do this by looking at the parent
element but now all the scrollbars are siblings in the dom.
Also, use this new class to fix#816 so that layering of the flyout and workspace scrollbars
are done correctly.
Adding support for extensions, functions that can assist with loading blocks, much like init functions, but that can be referenced from JSON definitions. This allows JSON definitions to define dynamic blocks such as onchange handlers and mutators.
Rewrote math_number as an example pure JSON block.
FieldNumber and FieldAngle previously accepted "undefined" as values, if not defined in JSON. This catches these and uses "0" for any NaN value. The constructor value parameter is now optional. Includes tests.
Adding support for string table lookups in dropdown field labels specified in JSON.
Adds Blockly.utils.replaceMessageReferences() method to handle string replacement without interpolation tokens. Effectively uses the same old code, now moved into tokenizeInterpolation_(), which takes a parseInterpolationTokens option.
Replaces the direct JavaScript references (not pure JSON, and thus not portable).
Demonstrating this behavior in the logic_boolean dropdown.
