[Feature request] Auto-assign card set

Sometimes I import a list of cards and forget to change the default set to what it should be, so then I have to go through every card and change the set.

You should be able to set the default set to something like "Most recent" to assign the set that the card was most recently printed into (which would be nice because of the fact that DGM drafts are 1/1/1 and thus have cards split between three sets) or "Guess where appropriate" to do something like assign a set to a card if it's the only set that card was released into.

At the very least, it'd be nice to have a button I can click post-import to guess card sets on each card in my inventory when there is only one possible set it could be.