Add "active decks" or "built decks" to control multiple built decks at same time with one single collection

[fafranco82]

The idea is to mark what decks are active or built (or will be built) so you can see if you have enough cards in your collection to build all of them at the same time.

Feature request by mail.

[GerritK]

Would be a very nice feature. My girlfriend and me are playing with the same collection. It's annoying to see that she's using the cards I need by looking for them in the binder.