Pass events to the OSK in dialogs which grab events
With commit c29e0cf6 the grabHelper already started using a similar mechanism to funnel events to the osk while a ClutterGrab is in effect. ModalDialog, the unlockDialog and lookingGlass don't make use of the grabHelper though, they use Main.pushModal() themselves, so those need to funnel the events to the OSK themselves.
Fixes #5317 (closed) Fixes #5273 (closed)
Edited by Jonas Dreßler