title: how to hide titleBar in list?
body: <p>By the default list does not have titleBar, but when I create a list in such a way it has an empty titleBar</p>
  
  <pre><code>Ext.define('Application.view.RecipeList', {
      extend: 'Ext.List',
      xtype: 'recipelist',
      requires: ['Application.store.Recipes'],
      id:'list',   
      config: {             
          grouped: true,
          itemTpl: '{title}',
          store: 'Recipes',
          onItemDisclosure: true
      }
  });
  </code></pre>
  
  <p>Can somebody help me to understand how to hide titleBar?</p>