Pontoon: Updated English (en-GB) localization of Marketplace
Pontoon: Updated English (en-GB) localization of Marketplace

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

mozilla/zamboni,mozilla/zamboni,mozilla/zamboni,diox/zamboni,ddurst/zamboni,washort/zamboni,washort/zamboni,mozilla/zamboni,ddurst/zamboni,diox/zamboni,jasonthomas/zamboni,ingenioustechie/zamboni,washort/zamboni,ddurst/zamboni,diox/zamboni,ingenioustechie/zamboni,ingenioustechie/zamboni,ddurst/zamboni,jasonthomas/zamboni,ingenioustechie/zamboni,washort/zamboni,jasonthomas/zamboni,diox/zamboni,jasonthomas/zamboni