Connection between Collection and Deck

When adding a card to a deck, it would be very helpful to see which other decks this card was already used in.
The next level would the possibility to assign/ link cards from the Collection to a certain deck, so that I see that I have e.g. used 4 Faithless Looting in Deck X and still have 1 copy available for another deck.
This would help players that want to build decks mostly from their excising collection.