gdk: revert surface activation change

c926b28d ('gdk: do not deactivate surface on keyboard grabs') and
f23bfc6b ('gdk: activate surface on keyboard grabs') changed the
situation where surfaces are considered active by gdk. This however has
unwanted consequences in the behavior of gnome-shell which is not
properly transferring focus for Orca to get the proper active events,
see for instance GNOME/gnome-shell#452

We'd thus just better these changes for now, until such issues are

See #85
2 jobs for window-activate-revert in 8 minutes and 59 seconds (queued for 1 minute and 31 seconds)
Status Job ID Name Coverage
passed build #106354


manual msys2-mingw32 #106355
win32 allowed to fail manual