title: What deletes the widget created by a custom QItemDelegate
body: <p>Working with the Qt ItemViews the editing widget of an item can be modified via a <code>QItemDelegate</code> that can create a custom editor via <code>createEditor</code>. Who is responsible for deleting the instance created by the delegate. </p>
  
  <p>I could not find any documentation that explained this, if you just point to the appropriate section that is fine </p>