widget factory: Add an example for an insensitive model button
widget factory: Add an example for an insensitive model button

This will make it easier to make insensitive model buttons
appear properly in other themes.

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