title: button tap not reacting when view gets added a 2nd time
body: <p>When an item from a list gets selected i execute the following lines of code.</p>
  
  <pre><code>this.details = Ext.create('EventManager.view.EventInfoView');
  this.getNavigationView().push(this.details);
  </code></pre>
  
  <p>so i create a new view, and push it on a navigationview.
  In my controller i listen for a tap on an acceptEventButton which is inside newly created view.</p>
  
  <pre><code>Ext.define('EventManager.controller.eventController', {
  extend: 'Ext.app.Controller',
  config: {
      refs: {
          acceptEventButton: '#acceptEventButton'
      },
  
      control: {
          "acceptEventButton": {
              tap: 'onAcceptButtonTap'
          }
      }
  },
  ...
  </code></pre>
  
  <p>The first time this view gets placed on the navigationview, the button tap works.
  When i hit the back button and push another view the button does nothing.</p>
  
  <p>I'd like to solve this by doing the logic as it is now. I'd rather not add the eventlisteners myself while i'm creating the view and then push it.</p>
  
  <p>Any ideas where this problem resides and how to fix?</p>