title: JvTreeView and JvCheckTreeView checkbox notification
body: <p>I have set a <code>JvTreeView.CheckBoxes</code> to <code>True</code>, and the check boxes are displayed and working as expected, but on Windows XP SP3 and below, the <code>OnNodeCheckedChange</code> event is not fired. I googled a little, and found <a href="http://issuetracker.delphi-jedi.org/view.php?id=5119" rel="nofollow">this issue on JVCL issue tracker</a>, but I can not apply it to the latest JVCL release (Version 3.47). Has anyone any fix for the check box event?</p>
  
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  <p>Update: The event is fired when I change the check box using space bar, but is not fired when I <em>click</em> on the check box.</p>