title: ExtJS - EditorGridPanel rows not draggable?
body: <p>I had a working grid-to-grid drag and drop configuration, but once I changed one of the grids to an EditorGridPanel, I could no longer drag from it - only to it. Once I click on the row I want to drag I get the following error:</p>
  
  <pre><code>sm.isSelected is not a function
  if(!sm.isSelected(rowIndex) || e.hasModifier()){
  
  ext-all-debug.js (line 45439)
  </code></pre>
  
  <p>Is there any way to set it up so I can drag rows from an EditorGridPanel?</p>