! Copyright (c) 1990-1997  Michael Sandrof, Troy Rollo, Matthew Green,
! and other ircII contributors.
!
! All rights reserved.  See the HELP IRCII COPYRIGHT file for more
! information.
!
Usage: WINDOW POP 
  Pops the top window off the window stack making it the current 
  window.  If it is hidden, then makes it visible first.
