GridStack (8.x-2.12-rc3) - en to unknown language translation catalogue (8 entries)

en: Delete
target: Wiskje

en: Cancel
target: Ofbrekke

en: Edit
target: Bewurkje

en: - None -
target: - Gjint -

en: Settings
target: Ynstellings

en: Preview
target: Foarbyld

en: Save
target: Bewarje

en: Debug
target: Utbrekke
