title: Sencha Touch - deselect list item?
body: <p>I'm working on a Sencha Touch application, and have a list of contacts. When a list item is tapped, an ActionSheet is displayed showing some basic functions (such as call, delete and ignore). Unfortunately, when the user taps and the ActionSheet is fired, the List item remains selected underneath the overlay (see the screenshot below):</p>
  
  <p><img src="https://i.stack.imgur.com/Pr9e4.jpg" alt="Screenshot of iOS Simulator"></p>
  
  <p>Here's the function bound to the itemTap event:</p>
  
  <pre><code>itemTap: function(list, index)
  {
      // Deselect the selected record:
      var currentRecord = list.getStore().getAt(index);
      currentRecord.forename      = currentRecord.get('forename');
      currentRecord.surname       = currentRecord.get('surname');
      currentRecord.phoneNumber   = currentRecord.get('phoneNumber');
      currentRecord.shortFullName = currentRecord.forename + ' ' +  currentRecord.surname[0];
  
      list.getStore().deselect(index, true);
  
      callButton.setText('Call ' + currentRecord.shortFullName + ' (' + currentRecord.phoneNumber + ')');
      unfriendButton.setText('Remove ' + currentRecord.shortFullName + ' as friend');
      friendActionSheet.show();
  }
  </code></pre>
  
  <p>Unfortunately, <code>list.getStore().deselect(index, true)</code> returns the following error: <code>Object [object Object] has no method 'deselect'</code></p>
  
  <p>Any ideas on what I could be doing wrong, or how I can achieve this?</p>