title: XTemplate definition on items property of a ListItem
body: <p>I'm using Sencha 2.3.0 and I want to have a XTemplate side-to-side to a component (textfield) on a ListItem. The code above works fine for DataView/DataItem, but I want to use the grouped property that is only available on List/ListItem.</p>
  
  <p>The nested Xtemplate gets rendered fine as DataItem. How can I make it work for ListItem? I'm also receptive for solutions that drop this nested structure and use the xtemplate as tpl property directly on the ListItem (of course the textfield with listeners must be implemented as well).</p>
  
  <p><strong>list</strong></p>
  
  <pre><code>Ext.define( 'app.view.myList', {
      //extend: 'Ext.dataview.DataView',
      extend: 'Ext.dataview.List',
  
      xtype: 'mylist',
  
      requires: [
          'app.view.MyItem'
      ],
  
      config: {
          title: "myTitle",
          cls: 'mylist',
          defaultType: 'myitem',
          grouped: true,
          store: 'myStore',
          useComponents: true,
          itemCls: 'myitem',
  
          items: [
              {
                  // some components
              }
          ]
      }
  });
  </code></pre>
  
  <p><strong>listitem</strong></p>
  
  <pre><code>Ext.define( 'app.view.myItem', {
  
      //extend: 'Ext.dataview.component.DataItem',
      extend: 'Ext.dataview.component.ListItem',
      xtype: 'myitem',
  
      config: {
          cls: 'myitem',
  
          items: [
              {
                  xtype: 'component',
                  tpl: new Ext.XTemplate([
                          '&lt;table cellpadding="0" cellspacing="0" class="myitemXTemplate"&gt;',
                              //some xtemplate content
                          '&lt;/table&gt;'
                      ].join( "" ),
                      {
                          compiled: true
                      })
              },
  
              {
                  label: 'some label',
                  cls : 'myitemtextfield',
                  xtype: 'textfield',
                  name: 'myitemtextfield'
               }
          ]
      }
  });
  </code></pre>
  
  <p>Thanks in advance!</p>