title: How to delete and add nodes to/from Dynatree prog
body: <p>how to delete and add nodes to/from Dynatree without disturbing other node?</p>
  
  <p>I have a Dynatree with check box And a user can add / remove nodes from a list of nodes in a pop up. While updating the data should be added / remove with out disturbing the previously checked nodes.</p>