Merged with Blockly proper:
Synchronized to commit 2025c479f9c66a541897f9c4f5d8a80c90e8a405 (https://github.com/google/blockly/commit/2025c479f9c66a541897f9c4f5d8a80c90e8a405)
This repository branch copy commit 5c9c23e4478d68e36b56f39d6a038de377f19dd7 (https://github.com/carlosperate/ardublockly/commit/5c9c23e4478d68e36b56f39d6a038de377f19dd7)