title: SplitContainer panel to fit content automatically
body: <p>I'm looking for pretty simple functionality, however I cannot find it (and surprisingly I cannot find anyone else asking this question). </p>
  
  <p>I've got split container with two panels - pretty simple setup, navigational TreeView on the left, ListView with items on the right. </p>
  
  <p>Now, what I would like to have is splitter automatically fixed on position when everything on the left (treeview) is visible and horizontal scroll bar is not displayed. I don't know in advance the size of the items (but I know that it's only 1 level deep). Something like "AutoGrow and then fix splitter". Surely I'm not the first one that is looking for this functionality :)</p>
  
  <p>Any idea how to achieve this?</p>
  
  <p>Thanks,
  Martin</p>