title: CollectionViewSource Filter not refreshed when Source is changed
body: <p>I have a WPF ListView bound to a CollectionViewSource. The source of that is bound to a property, which can change if the user selects an option.</p>
  
  <p>When the list view source is updated due to a property changed event, everything updates correctly, but the view is not refreshed to take into account any changes in the CollectionViewSource filter. </p>
  
  <p>If I attach a handler to the Changed event that the Source property is bound to I can refresh the view, but this is still the old view, as the binding has not updated the list yet.</p>
  
  <p>Is there a decent way to make the view refresh and re-evaluate the filters when the source changes?</p>
  
  <p>Cheers</p>