title: Sencha Touch - When switching Items using setActiveItem(), how can I access the Back button?
body: <p><strong>Problem:</strong></p>
  
  <p>I switch Panels using <em>setActiveItem()</em> according to question-answer on <a href="https://stackoverflow.com/questions/8291460/sencha-touch-tabbar-page-navigation-why-its-breaking/8313591#8313591">this link</a></p>
  
  <pre><code>App.views.viewport.getActiveItem().setActiveItem(App.views.Panel, { type: 'slide', direction: 'left' });
  </code></pre>
  
  <p>Everything works fine, but how can I access my back button?</p>
  
  <p>I suspect that theres only 1 back button, and I have to change his properties (text, handler).
  How Can I do that?</p>
  
  <p>Thank you, Shlomi.</p>
  
  <p>P.S- when thinking about it, I have to modify all the bar properties - its title as well.</p>