This file was written before we understood and fixed Wants and After.
See readme in plasma-workspace/startkde/systemd for details. Workspace
was fixed, kwin is in another repoistory and got missed.
This causes potential for things like font DPI to not be exported.
By marking as part of graphical-session we get a more graceful shutdown.
Also switched to explicit restart inside the unit. Originally I did this
with drop-ins, but this complicates wayland for now.