en to en_GB translation catalogue (3 entries)

note: type: Plain text
en: Maximize the terminal window.
en_GB: Maximise the terminal window.

note: type: Plain text
en: Minimize the terminal window.
en_GB: Minimise the terminal window.

note: type: Plain text
en: Show the Tilix preferences dialog directly.
en_GB: Show the Tilix preferences dialogue directly.
