Add uninstaller options to remove settings and plugins
Added "Import" button in Global Sources Dialog.

Users are able to Import Global Sources into the current Scene
Collection's own Global Sources from "sceneCollection\scenes.xconfig".

The "Import" button lists all Global Sources from
"sceneCollection\scenes.xconfig".

With this change scene collections have their own Global Sources but users can import Global Sources from "sceneCollection\scenes.xconfig".