xochitl package should restart the xochitl.service on postremove

[Havner]

Describe the issue

When removing the xochitl package the service that is running is run through /opt/bin/xochitl which means it's probably run with a rm2fb client (xochitl.service.d/toltec-wrapper.conf).

An issue arose with it when removing toltec completely (toltecctl uninstall) that xochitl held /opt and it couldn't be unmounted (device is busy).

Uninstalling xochitl package should restart the service on postremove so it's running through /usr/bin/xochitl and it releases any held files/whatever from /opt.

Discussed on discord. Hopefully it's clear and simple enough for me not to put "steps to reproduce".

[Havner]

One thing to consider is that maybe it should be restarted only if it is running and/or enabled? I don't exactly know all the use cases here, whether it is a valid use case to have xochitl disabled when doing toltecctl uninstall and actually not wanting it to run afterwards? I presume it's like 1% of use cases but I know too little about the assumptions toltec makes here to know for sure.

Just adding this comment as a thought to consider. In any case if the service is actually running it should be restarted.

[Eeems]

toltecctl uninstall will enable xochitl after finishing removing everything:

toltec/package/toltec-bootstrap/toltecctl

Line 802 in bffc3f9

systemctl enable xochitl

#692 this PR makes the output from this even better for end users.