Pontoon: Update English (Great Britain) (en-GB) localization of WebThings Gateway
Pontoon: Update English (Great Britain) (en-GB) localization of WebThings Gateway

Localization authors:
- Ian Neal <iann_bugzilla@blueyonder.co.uk>

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