Added the Problems panel
New features to Browse > Addons and Games in Spawnmenu
New Right click options - Open on Workshop and Create Spawnlist
Both Addons and Games now reload when game content is remounted
Nicer error handling for Browse > Addons
Fixed a bug with DTree_Node when MakeFolder was called on a node whose parent is expanded, forcing the user to collapse and re-expand the parent node for the folder to populate