title: kendo ui - tree, cannot update main node
body: <p>I am using angular + kendo ui. I have created a tree and added first node as dummy</p>
  
  <pre><code>$scope.treeData = kendo.observableHierarchy({
           data: [{ text: "" ,items: [] }]
      });
  </code></pre>
  
  <p>after that when I have the right data , I want to place the right data</p>
  
  <pre><code>function init() {
          var query = CSensorGroupRepositoryService.getQueyObject().where("ParentID", "==", 0); // groups with no parent
          CSensorGroupRepositoryService.getEntitiesByQuery(query).then(function (results) {
              var parent = { text: results[0].GroupName, items: [] };
  
              buildTreeHierarchy(results[0], parent);
              $scope.treeData[0].text = results[0].GroupName;
  
          });
      }
  </code></pre>
  
  <p>how ever in the view - the text is empty</p>