Mutter SSD decorations do not properly scale -gtk-scaled images
As you can see, when using
As per commit e36b629c using
cairo_set_device_scale in mutter would suffice to fix the issue (instead of
cairo_scale), but while that could be right and can be done, I think that using
cairo_get_device_scale on the target is wrong anyway, while we should use what
-gtk-scaled already does, and so the style provider scaling.