So suppressing notifications by either the launcher status or service
status can be enabled/disabled together with the re-connect tweaking. This
makes more sense than having it unconditionally enabled and makes the
presence of the feature (and when it is effective) also more visible to
users.
* Lazy initialize systemd interface and don't initialize it
at all if the unit name is empty
* Allow to supervise/control system-wide units in addition to
user units (see https://github.com/Martchus/syncthingtray/issues/61)
* Avoid redundant code