Prevent "Flicker" of Images in ExtJS Grid on Grid Update/Refresh
===

I'm displaying images in an ExtJS grid by using column renderers that return HTML <img> tags. The issue is that the images "flicker" (i.e., vanish and re-appear) each time the grid is updated. Is there a way to prevent this? Here's a simplified example of what I'm doing:

    Ext.create('Ext.grid.Panel', {
      title: 'My Grid',
      store: myStore
      columns: [
        {
          header: 'Image', 
          dataIndex: 'imgUrl',
          renderer: function(imgUrl, meta, record) {
    
            // Add a mouse-over / tooltip that shows the name
            meta.tdAttr = 'data-qtip="' + Ext.String.htmlEncode(record.getName()) + '"';
    
            return '<img src="' + imgUrl + '">';
          }
        }
      ]
    });