stylecontext: Don't copy CSS values on context_save()
stylecontext: Don't copy CSS values on context_save()

Keeping them is a bad idea now where the widget paths are actually
changed by a save(). And almost all of the time, state or style classes
will be changed anyway.

Looking them up again is just a hash table lookup anyway.

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