bwn / banishwindow            Removes an 'external' window from a workspace grid

   Format:
      ;bwn                    Banishes all 'external' windows
      ;bwn <number>           Banishes 'external' window <number>

   Notes:
      The workspace grid is an invisible grid, spanning the whole available
         workspace, on which Axmud tries to arrange its windows so that they
         don't overlap (as far as possible). The grid is divided into zones
         within which one or more windows are arranged. The 'blueprint' for
         zones on a desktop is called a 'zonemap'.
      Only 'grid' windows (including the 'main' window, task windows and the
         automapper window) are arranged on the workspace grid. Temporary
         windows, including the data viewer window and all edit, preference,
         wizard and dialogue windows, are not affected.

      'external' windows are any window not created by Axmud. Sometimes it's
         convenient to place an 'external' window on one of Axmud's workspace
         grids so that it doesn't overlap Axmud windows (as far as possible).
         Use the ';grabwindow' command to do that, and use this command to
         remove it from the workspace grids (for your convenience, the
         window is minimised).
      A window's <number> can be obtained with the ';listwindow' command.

      Note that this command only works on X11-based window managers (so it
         definitely will not work on MS Windows).
      Note that on other operating systems, at the time of writing, the window
         is not minimised. This is not issue with the wmctrl library, not with
         Axmud itself.

   User commands:
      bwn / banwin / banishwin / banishwindow
