As per systemd.special(7)[0] graphical-session-pre.target is strictly
for units that set up things for a graphical session. Most notably,
these are usually started *before* the compositor/session is actually
ready.
While Home Manager's current implementation of graphical-session.target
allows these units to work regardless of what systemd.special(7)
specifies, other setups like ones with uwsm[1] do not allow these units
to start properly.
[0]: https://www.freedesktop.org/software/systemd/man/latest/systemd.special.html#graphical-session-pre.target
[1]: https://github.com/Vladimir-csp/uwsm
Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>
This target is for systemd units that require a system tray to be
running.
This also fixes taffybar.service: previously, systemd would consider it
to be active (running) before it was actually ready to accept tray
icons.
