title: DataWindow select group row
body: <p>I have several datawindows with different looks. One simple just has a detail band and shows information. I can select rows in that datawindow, which marks that row. I got another DW that has a groupband with all the columns in it, and for some reason I can't select rows in that one.</p>
  
  <p>I've also noticed that for example in itemfocuschanged(...) the dwobject argument is null for the DW with the group band. How do I solve this so also can select rows in my other DW?</p>