expander: Fix drawing in rtl
expander: Fix drawing in rtl

GtkBuiltinIcon leaves the cairo context in unclean state
when drawing, work around that.

grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita,grubersjoe/adwaita