More bit manipulation speedups
More bit manipulation speedups

The same trick that was applied to _gtk_css_change_for_child in
the previous commit can be applied to _gtk_css_change_for_sibling
as well, and that is what this commit does.

With both functions converted, gtk_css_change_translate is no
longer needed and gets dropped.

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