I'm using Qubes R3.2 with XFCE4 and I'm trying to have an uniform look for my desktop appearance between the dom0 desktop and the AppVMs using the Numix theme which makes notably dom0 panel bar almost black.
AppVM trayicons such as nm-applet of the sys-net remains with a white background. I read that it was possible to change it (https://github.com/QubesOS/qubes-issues/issues/2042) and I also tried several options with qubes-guid but without any success. Notably, trayicon_mode="bg" in /etc/qubes/guid.conf for sys-net does nothing.
Does anyone have already encountered this problem and succeed in changing the white background?
Thank you in advance. Sincerely,
Epitre