liboktetacore - en to nb translation catalogue (4 entries)

[ctx: name of the change]
en: Insert
nb: Sett inn …

[ctx: name of the change]
en: Remove
nb: Fjern

[ctx: name of the change]
en: Replace
nb: Erstatt

[ctx: name of the change]
en: Swap Ranges
nb: Bytt områder
