Spoiler view fix, Secret Lair cards, Alternate Art MKM

- fixed a bug from quite a while ago causing some cards to show Dungeon of the Mad Mage as their image in deck spoiler view
- fixed card photos not showing properly in a trade listing after the trade was accepted
- imported some missing Secret Lair cards
- imported 6 serialized MKM cards
- imported 10 "subtle" alternate art MKM cards (green rope Undercover Crocodelf, etc)
- imported a few more missing March of the Machine double-sided tokens