Created js logic to handle Drag and Drop ( jstree plugin ):
- Disable dnd at start
- Trigger disabel on button click. Added simple class toggle ( color ).
- Allow dnd only if opertion is move and if node has draggable attr set to true - avoid to sort root nodes.
Merge branch '2.0' of git://github.com/Bitnoise/BtnAdminBundle into 2.0