awesome@.service: fix cursor setting (call xsetroot with ExecStartPre=).
system/user-session@.service: set correct After= dependencies so system shutdown works without explicit unit stop.
system/user-session@.service: add Restart=on-failure (sometimes session start fails with 219/CGROUP).
user/bluedevil@.service: start/stop dynamically when bluetooth adapters are added/removed.

BlueDevil, when used outside of KDE (apparently), fails to autodetect
new bluetooth devices on-fly.