[Feature] Rematch button

[Wikignometry]

Would be cool to have a button to rematch after a game so we don't have to create a new lobby. The simplest version of this is probably to rematch with the exact same decks and sides. More advanced iterations of this could allow you to swap sides but we'd need to figure out how the deck selection interface would work.

[NBKelly]

Yeah, that does sound neat.
I think the most responsible implementation would just put the players in a new lobby, with the same format, decklists and sides selected, and trust the players to either click "start game" or change the decklists as they like.