Pontoon: Update Swedish (sv-SE) localization of WebThings Gateway
Pontoon: Update Swedish (sv-SE) localization of WebThings Gateway

Localization authors:
- Luna Jernberg <bittin@cafe8bitar.se>

moziot/gateway,moziot/gateway,mozilla-iot/gateway,mozilla-iot/gateway,mozilla-iot/gateway,moziot/gateway,mozilla-iot/gateway,mozilla-iot/gateway