en to en_GB translation catalogue (2 entries)

note: i18n: ectx: property (text), widget (QLabel, labelP4config)
en: P4 Config
en_GB: P4 Configuration

[ctx: @option:radio]
note: i18n: ectx: property (text), widget (QRadioButton, radioButtonVariables)
en: User/Port Config
en_GB: User/Port Configuration
