WM_Sn manager selection

[Havoc Pennington <hp redhat com>]

Hi,

Most window managers don't seem to implement the manager selection.
Do you think it would help to add text like this to the EWMH?

  Window managers must implement the manager selection described in
  section 4.3 of the ICCCM, following the suggestions in section 2.8
  for user-friendly behavior. In particular, when losing the manager 
  selection a window manager should unmanaged the screen in question, 
  and when an existing selection owner is detected, window managers 
  should ask the user whether to replace it.

Ideally this could then be used to implement e.g. the GNOME window
manager control panel. Right now that control panel does something
like walk up the window hierarchy, find a WM frame, and XKillClient()
the WM. ;-) Not nice.

Havoc