EXOGTN-1815 Add supported-locale for I18NMessage.js and UIGadget.js

Fix description:
* I18NMessage.js generates the i18n labels for GateIn's Date Time Picker and Save, Cancel buttons when editing a gadget's setting
* UIGadget.js generates the i18n label for the confirmation when deleting a gadget.
PLF-6032: Add supported-locale of Romanian, Polish for I18NMessage.js and UIGadget.js
UI-3362  Create a list of colors used within the platform 4.1
Merge commit 'c114fd1b9be96b84755a6603a90a0ae6e200d250' into HEAD