en to en_GB translation catalogue (5 entries)

en: Add new category with color
en_GB: Add new category with colour

en: Colors of categories - Orage
en_GB: Colours of categories - Orage

en: This is special category, which can be used to color this appointment in list views.
en_GB: This is special category, which can be used to colour this appointment in list views.

en: update colors for categories.
en_GB: update colours for categories.

en: Minimized
en_GB: Minimised
