Drop client support for notification area (systray)
As GNOME encourages us to do by releasing 3.26
https://blogs.gnome.org/aday/2017/08/31/status-icons-and-gnome/
maybe it's time to visually clear up some things here.
Affects account settings view as well. savoirfairelinux/ring-client-gnome#791
What do you think?