To be honest, SyncTrayzor probably isn't a good fit for you here. The stuff that puts it above the other tray utilities are:
- Embedded web browser
- Various notifications: synchronization finished, device connected/disconnected
- File transfer progress stuff
- Built-in inotify
None of that stuff is useful on a server, and will only use resources unnecessarily. The embedded web browser in particular will gobble 40-odd megs (although I only load it the first that time SyncTrayzor is restored from the tray), while the notifications stuff will increase Syncthing's resource usage slightly (since I'm occasionally asking it for stuff), and the inotify is useless
It might be fun to make separate Syncthing server service manager (which forces people to do things like not run it as an admin) but that's another project for another day.
QSyncthingTray popped up recently: I don't think that does any of the fancy stuff that SyncTrayzor does, and so may be a better fit for you.