IMPROVE. RadTreeView - add support for DataBindings of RadTreeNode

Resolution: The feature is duplicated with feedback item ADD. RadTreeView - add support for binding the checkboxes of the nodes to a field in the data
Here is the link to item:  http://feedback.telerik.com/Project/154/Feedback/Details/112624-add-radtreeview-add-support-for-binding-the-checkboxes-of-the-nodes-to-a-field. 

Allow setting the AutoExpand time of node when drag operation is performing.