systemsettings - en to en_GB translation catalogue (4 entries)

note: i18n: ectx: property (windowTitle), widget (QWidget, ExternalModule)
en: Dialog
en_GB: Dialogue

en: Info Center
en_GB: Info Centre

en: Centralized and convenient overview of system information.
en_GB: Centralised and convenient overview of system information.

en: Central configuration center by KDE.
en_GB: Central configuration centre by KDE.
