Which is exactly how Facebook works... i.e. you select some files and then you mess around with the album properties, like date/place take, album notes and what

Which is exactly how Facebook works... i.e. you select some files and then you mess around with the album properties, like date/place take, album notes and whatever else there is. Granted you need to explicitly choose the photo's in the first place, but that's the green button you speak of.