Feature request - card favouriting functionality

[allesginevra]

with paper cards, if I were deck building, I'd go through my cards & make a little stack of cards I might want in my deck. Then when I've finished looking at cards, I'd build my deck from my little stack. I'd like to do that in NRDB also - have some way, when I am on the card page, of noting that this is a card I'm interested in. And then have some way of calling up all those cards I've noted when I move into the deck building section of NRDB