fixed: add a comment for gtk_style_context_set_background()
fixed: add a comment for gtk_style_context_set_background()

And wrap it with G_GNUC_IGNORE_DEPRECATIONS.
Unfortunately we can't stop rendering the background altogether here.
Also, gtk_style_context_set_background() should really be called every
time the style is updated. Fix that.

jigpu/gtk,grubersjoe/adwaita,davidgumberg/gtk,jigpu/gtk,jigpu/gtk,jigpu/gtk,chergert/gtk,grubersjoe/adwaita,jadahl/gtk,grubersjoe/adwaita,chergert/gtk,alexlarsson/gtk,jadahl/gtk,davidgumberg/gtk,jigpu/gtk,grubersjoe/adwaita,davidgumberg/gtk,Adamovskiy/gtk,jadahl/gtk,jadahl/gtk,jigpu/gtk,Adamovskiy/gtk,davidgumberg/gtk,Adamovskiy/gtk,grubersjoe/adwaita,alexlarsson/gtk,alexlarsson/gtk,chergert/gtk,davidgumberg/gtk,chergert/gtk,chergert/gtk,Adamovskiy/gtk,Adamovskiy/gtk,jadahl/gtk,jigpu/gtk,grubersjoe/adwaita,jigpu/gtk,chergert/gtk,alexlarsson/gtk,chergert/gtk,jadahl/gtk,alexlarsson/gtk,jadahl/gtk,alexlarsson/gtk,Adamovskiy/gtk,alexlarsson/gtk,davidgumberg/gtk,grubersjoe/adwaita,davidgumberg/gtk,davidgumberg/gtk,grubersjoe/adwaita,Adamovskiy/gtk,jadahl/gtk,alexlarsson/gtk,chergert/gtk,Adamovskiy/gtk