gtkwidget: Fix a typo preventing the CSD input shape from applying
gtkwidget: Fix a typo preventing the CSD input shape from applying

We were setting "csd-shade" but reading from "csd-region".

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