GameUI: Added auto upgrade mechanism.
The GameUI now checks whether its current version is compatible with the server version. If an upgrade is needed, GameUI asks the user to confirm, downloads the new installer and runs it.
To configure the upgrade system please follow the instructions here:
GameUI: Items added by other users were not automatically downloaded in the two following scenarios:
* After checking-in a directory locally added.
* After configuring an empty directory (without children) to be loaded.
Fixed. Now the new content is correctly downloaded in both scenarios.
Revert from 2d version tree. The 2d version tree now has a context menu option to allow reverting to a specific revision.
Additionally the 2d version tree now highlights the currently loaded revision in the workspace.
GUI: The 'create branch' dialog has been redesigned.