title: How can I get list selected items in sencha touch 2.3.1
body: <p>How can I get selected items of Ext.List on sench-touch 2.3.1?
  Thank you.</p>
  
  <pre><code>[View]
  {
    xtype: 'list',
    itemTpl: '{MATERIAL_ID} {TEXT}',
        mode: 'MULTI'
  }
  
  [Controller]
  'queryresult #queryButton': {
     tap: function(){
        var list = Ext.ComponentQuery.query('queryresult #list')[0];
  
        //todo: get selected items
       }
    }
  </code></pre>