On a default install of MicroOS Desktop (KDE) (ALPHA) 20200824-0, there is no
obvious way to reboot the machine after install packaged with
transactional-update.

Here's what I've tried. 
1. 'transactional-update reboot' (notifies rebootmgrctl that a reboot is
requested, but 'rebootmgrctl status' seems to be waiting for the scheduled
maintenance time.
2. 'rebootmgrctl reboot now' does not seem to do anything.
3. 'rebootmgrctl reboot fast' does not seem to do anything.
4. Click "Leave" -> "Restart" from KDE menu does not seem to do anything.
5. Click "Leave" -> "Shutdown" from KDE menu does not seem to do anything.
6. Click "Leave" -> "Shutdown" from KDE menu does not seem to do anything.
7. 'systemctl reboot' drops to a non-graphical target with login prompt, but
doesn't continue with a reboot.
8. 'shutdown -r now' drops to a non-graphical target with login prompt, but
doesn't continue with a reboot.
9. 'shutdown -h now' complains about not being able to unmount /etc, but
eventually does halt.
10. 'systemctl reboot' to drop to term and the ctrl-alt-delete several times
does eventually reboot

>From what I can tell, 4-6 only happen when running the X session for KDE. If
you run the Wayland session, 4-6 work but the others still don't. I haven't
tried Wayland (Full). 

Other notes and observations:
1. I don't think the X session is starting the org.kde.ksmserver, but it does
get started for Wayland.
2. I'm using full-disk encryption.
3. No matter how I exit the KDE session, it never saved my display
configuration. I have to reconfigure the displays each time. Perhaps another
bug report for this one.