title: Sencha Touch 2 list in a sheet doesn't show
body: <p>I need a list of names to display within a sheet in sencha touch.  The sheet will display all other child items, but not the list. Am I doing something wrong, or does this simply not work?  Here is the code: </p>
  
  <pre><code>myList = Ext.create('Ext.dataview.List', {
      store: myStore,
      itemTpl: '{firstName}, {lastName}'
  });
  
  
  mySheet = Ext.create('Ext.Sheet', {
      items: myList
  });
  
  
  Ext.create('Ext.Panel', {
      fullscreen: true,
      items: [ 
          mySheet,
          {
              xtype: 'button',
              text: 'Click Me',
              handler: function() {
                  mySheet.show();
              }
          }
      ]
  });
  </code></pre>
  
  <p>Thanks in advance!</p>