Needed for X2Go as it does not have XRES 1.2 extension.

Before using any Xres extension one must call XResQueryExtension()
Also make sure Xres 1.2 is available as marco need XResQueryClientIds()

window-props: use XResQueryClientIds to get pid

_NET_WM_PID is unreliable! It can be faked or pid might be from
different namespace. Ignore _NET_WM_PID and use XResQueryClientIds
to get pid.

https://gitlab.gnome.org/GNOME/metacity/-/commit/bcbe966511362a8eb8c8c64035ab160086c931f8

When opening and then closing certain applications
the focus was correctly regained by the previous window
but it wasn't brought into the foreground.

To fix this we call meta_workspace_focus_default_window() for both NotifyDetailNone and NotifyPointerRoot.

These two are always mentioned together in the X docs:
https://tronche.com/gui/x/xlib/events/input-focus/normal-and-grabbed.html

Some programs will have NotifyDetailNone when closed, while others end up with NotifyPointerRoot.

fixes https://github.com/mate-desktop/marco/issues/735

 The marco WM is used in Arctica Greeter [1]. There recently
 has a security issue been detected where people could open
 applications via marco keybindings inside the greeter (display
 manager) session.
 .
 A work-around could be evoking marco-message after marco startup
 and disable all keybindings then. However, a more preferred fix
 is provided by this patch: start-up marco with keybindings disabled
 from the beginning.