title: Infinite list with Sencha Touch 2.3
body: <p>I'm developping a chat interface and trying to obtain the infinite list effect with Sencha Touch list component. I want to dynamically load older messages when the user scrolls up. </p>
  
  <pre><code>myList.getStore().insert(0,itemsArray);
  </code></pre>
  
  <p>The problem :
  When I insert new items at the top of the list it automatically scrolls to the top. Is there a way to avoid it ?</p>