Load all sprites in sprite sheet from editor script

[eses]

@Verdemis - I asked a bit similar question a few days ago. Was trying to get only selected sprites, but was already able to get all sprites from a file:

How to get selected sprites from Texture asset?

I actually figured this out (eventually). If someone else needs this - here it is: Sprite[] selSprites = Selection.GetFiltered<Sprite>(SelectionMode.Unfiltered);