I actually seems enough to modify /usr/share/themes/Radiance/gtk-3.0/gtk-widgets.css to get back the correct behavior.
So it seems to nly be an issue with light-themes and not nautilus.
I actually seems enough to modify /usr/share/ themes/ Radiance/ gtk-3.0/ gtk-widgets. css to get back the correct behavior.
So it seems to nly be an issue with light-themes and not nautilus.