This reverts the change for bug 194323, which is now no longer necessary.
Removing this means that the GtkWindow is realized with its event mask set and
oxygen-gtk knows to keep out of our way.
--HG--
extra : transplant_source : %81%A4%C3o%A7%EF%91y%B8%E2%B1%FE%A9%F3v/%0A%CF%2A-