title: How to force CMFCPropertyGridCtrl to refresh after adding an item?
body: <p>I add an item to the CMFCPropertyGridCtrl, but the new item does not show up only if i click the CMFCPropertyGridCtrl. </p>
  
  <p>Now i have a indirect solution to show up the new item by calling <code>ExpandAll()</code>, but i don't want to expand those i have collapsed.</p>
  
  <p>Is there a way to show up the new item gracefully ?</p>