title: ExtJS itemmouseenter(mouseover) grid row and change cell text to image
body: <p>Hi I tried to change cell text to image when I itemmouseenter(mouseover) the grid row.</p>
  
  <p>I have a event listener like this:</p>
  
  <pre><code>itemmouseenter: function(me, record, item, index, e, eOpts) {
      var store = this.getStore();
      var rowIndex = index;
      store.getAt(rowIndex).set('name', '&lt;img src="http://sstatic.net/stackoverflow/img/icon-16.png" /&gt;');
  }
  </code></pre>
  
  <p>Actually, it changed the text to image but It can't change back to original text.</p>
  
  <p>My goal is just like css hover effect. Is any suggestions to do this trick?</p>
  
  <p>Thanks</p>
  
  <p><a href="https://fiddle.sencha.com/#fiddle/11sf" rel="nofollow">Fiddle Sample</a></p>