PBL-21894 Add color support for window layout editor#222

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Spacerat wants to merge 10 commits intomasterfrom

feature/colour-IB

Commits on Sep 6, 2016

Support for colours in IB.
Joseph Atkins-Turkish
committed
Added a fully working colour picker for IB colours.
Joseph Atkins-Turkish
committed
IB support for switching between Colour/BW preview.
Joseph Atkins-Turkish
committed
Cleanup, whatsnew.py, and changes for code review
Joseph Atkins-Turkish
committed
Swapped right-bar buttons
Joseph Atkins-Turkish
committed
SDK-dependant options and display
Joseph Atkins-Turkish
committed
Renamed ColourEnabled to colorEnabled
Joseph Atkins-Turkish
committed
Include PBI in per-platform resource previews
Joseph Atkins-Turkish
committed
Optimized colour description object.
Joseph Atkins-Turkish
committed
Added Gray for SDK 3 B&W watches
Joseph Atkins-Turkish
committed