GtkRadioButton: Allow setting group more than once
GtkRadioButton: Allow setting group more than once

It turns out that GtkBuilder will sometimes set a property
twice. Normally, this is harmless, but for GtkRadioButton:group,
it triggered a critical. Remove that.

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