gtk: fix #9772
This issue is that Dialog boxes sometimes can't be closed (intermittent)
GNOME/gtk#6297 (closed) GNOME/gimp#9772 (closed)
Still needs to be verified for a bit longer.
This issue is that Dialog boxes sometimes can't be closed (intermittent)
GNOME/gtk#6297 (closed) GNOME/gimp#9772 (closed)
Still needs to be verified for a bit longer.