[Drag&Drop] allow any CGUIControl to be a drop target
[SKIN] Show the dragged items icon while dragging
[FIX] Always keep the dragged item selected
[FIX] Diasallow deactivation of mouse while dragging
Decouple DragAndDropManager from GUIControls
Decouple CMouseStat from DragAndDropManager
VC project update for DND
Makefile updated for DnD