ui: Fixes 10078
Fixes menu bar color issue on dark themes
GNOME/gimp#10078 (closed) (was for 2.99 but equally an issue in 2.10)
(cherry picked from commit 1c8eda05)
Fixes menu bar color issue on dark themes
GNOME/gimp#10078 (closed) (was for 2.99 but equally an issue in 2.10)
(cherry picked from commit 1c8eda05)