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

Co-authored-by: Ian Neal <ee990f0d41d046aab7a742719f67aed90edbff00@blueyonder.co.uk>

diox/olympia,diox/olympia,diox/olympia,wagnerand/addons-server,wagnerand/addons-server,mozilla/addons-server,wagnerand/addons-server,mozilla/addons-server,mozilla/addons-server,diox/olympia,mozilla/addons-server,wagnerand/addons-server