Bug#1027069: waybar: improve its .service file?

[Vladimir K]

One can repurpose sysetmd XDG Autostart filter:

Either exlusive method:

    ExecCondition=/lib/systemd/systemd-xdg-autostart-condition "" "GNOME:KDE"

Or inclusive:

    ExecCondition=/lib/systemd/systemd-xdg-autostart-condition 
"wlroots:sway:Wayfire:labwc" ""