[xfwm4] GTK_WINDOW_POPUP

[Jasper Huijsmans]

Olivier,

When I make the popup windows of type GTK_WINDOW_POPUP, they are never
decorated even if I tell it to. It does work with GTK_WINDOW_TOPLEVEL.

I don't have a GTK2 program with tear-off menu's, but can it be that
this caused my earlier problems. I think GTK sets this on it's own
popups. This problem does not appear with GTK1, so it probably has to do
with an extended wm hint, my guess is _NET_WINDOW_TYPE_MENU.

I will try to check this now.

greetings,
Jasper