title: How to add Tree in the Combo box
body: <p>We are trying to show the tree structure in the combo box using the following source
  <a href="https://fiddle.sencha.com/#fiddle/g50&amp;view/editor" rel="nofollow noreferrer">https://fiddle.sencha.com/#fiddle/g50&amp;view/editor</a> </p>
  
  <p>We are able to view the tree structure in the combo box however when we select any node its not being displayed in the combo box.</p>