gnome-games - en to en_GB translation catalogue (2 entries)

en: Set the difficulty level of the sudokus you want to print. Possible values are: "easy", "medium", "hard", "very_hard"
en_GB: Set the difficulty level of the sudokus you want to print. Possible values are - “easy”, “medium”, “hard”, “very_hard”

en: true if the window is maximized
en_GB: true if the window is maximised
