hm, set_modal doesn't really work with random gtk_grab_add/gtk_grab_remove

hm, set_modal doesn't really work with random gtk_grab_add/gtk_grab_remove

Sat Feb 20 20:59:25 1999  Tim Janik  <timj@gtk.org>

        * gtk/gtkwindow.c: hm, set_modal doesn't really work with random
        gtk_grab_add/gtk_grab_remove calls. either the window user uses
        the set_modal interface or he places grab_add/grab_remove on his own.
        (gtk_window_set_modal): enforce modality state either way.
        (gtk_window_hide): revert previous change.