GtkCellRendererAccel: rework the grabbing
GtkCellRendererAccel: rework the grabbing

Grab keyboard/mouse on the toplevel, and grab the focus to the
cell editable, so we actually see the key events.

ahodesuka/gtk,davidgumberg/gtk,ahodesuka/gtk,grubersjoe/adwaita,jadahl/gtk,Adamovskiy/gtk,jessevdk/gtk,jadahl/gtk,Lyude/gtk-,davidgumberg/gtk,davidgumberg/gtk,jessevdk/gtk,davidgumberg/gtk,davidgumberg/gtk,ahodesuka/gtk,grubersjoe/adwaita,davidgumberg/gtk,Lyude/gtk-,chergert/gtk,Adamovskiy/gtk,Lyude/gtk-,jigpu/gtk,jessevdk/gtk,jigpu/gtk,jigpu/gtk,ahodesuka/gtk,grubersjoe/adwaita,Lyude/gtk-,alexlarsson/gtk,jigpu/gtk,alexlarsson/gtk,chergert/gtk,Lyude/gtk-,grubersjoe/adwaita,grubersjoe/adwaita,alexlarsson/gtk,alexlarsson/gtk,chergert/gtk,grubersjoe/adwaita,jadahl/gtk,grubersjoe/adwaita,Lyude/gtk-,grubersjoe/adwaita,alexlarsson/gtk,jadahl/gtk,jadahl/gtk,jigpu/gtk,Adamovskiy/gtk,ahodesuka/gtk,jessevdk/gtk,jadahl/gtk,chergert/gtk,davidgumberg/gtk,chergert/gtk,alexlarsson/gtk,alexlarsson/gtk,jigpu/gtk,jadahl/gtk,Lyude/gtk-,Adamovskiy/gtk,davidgumberg/gtk,Adamovskiy/gtk,jigpu/gtk,chergert/gtk,ahodesuka/gtk,chergert/gtk,Adamovskiy/gtk,Adamovskiy/gtk,ahodesuka/gtk,chergert/gtk,jessevdk/gtk,jessevdk/gtk,Adamovskiy/gtk,jadahl/gtk,Lyude/gtk-,jigpu/gtk,alexlarsson/gtk,ahodesuka/gtk,jessevdk/gtk