Add node handler to the cloning example

Author: Niels Dequeker

examples/views/cloning.html

@@ -13,7 +13,7 @@
 </script>
 <script type="text/ng-template" id="nodes_renderer2.html">
   <div class="tree-node">
-    <div class="pull-left tree-handle" >
+    <div class="pull-left tree-handle" ui-tree-handle>
       <span class="glyphicon glyphicon-list"></span>
     </div>
     <div class="tree-node-content">