Update some settings labels

- Make GEO strings smaller to prevent breaking layout
- Specify E-Mail insted of Kontakt (Monitoring will need the E-Mail)

Signed-off-by: Dominik Heidler <dominik@heidler.eu>
Reviewed-by: Tobias Klaus <tk+ff@meskal.net>
Reviewed-by: Tim Niemeyer <tim@tn-x.org>