Focus Bug

[Dimitrie O. Paun]

Summary: Clicking on the caption of a manage window does not move
         the focus as it should. This results in ugly artifacts.

Steps to reproduce:
  1. Fire up Notepad
  2. Open the "Open" dialog (File | Open)
  3. Expand the "Look in" dropdown (the one at the top, with the drives)
  4. Click on the dialog caption, and drag it away
  Result: The dropdown does not close, and remains on the spot.

Any way to know that the WM has now the focus, so we can release it?