title: How to set default value for KendoDropDownTreeView
body: <p>i am using kendodropdownTreeview for display treeview in dropdownlist     </p>
  
  <pre><code>var dropDownTreeView = $("#dropDownTreeView").kendoExtDropDownTreeView({
  treeview: {
      dataSource: new kendo.data.HierarchicalDataSource({
          data: [
              {
                  text: "Furniture", items: [
                    { text: "Tables &amp; Chairs" },
                    { text: "Sofas" },
                    { text: "Occasional Furniture" }
                  ]
              },
              {
                  text: "Decor", items: [
                    { text: "Bed Linen" },
                    { text: "Curtains &amp; Blinds" },
                    { text: "Carpets" }
                  ]
              }
          ]
      })
  }}).data("kendoExtDropDownTreeView");
  </code></pre>
  
  <p>i want to set default selected value 'Decor' , how can i achieve this ? </p>