Fix game-over screen, again

Fix: New game deleted instantly due to race condition
Only delete empty games with a 1% chance
Set gamestate to 'champ' when the game is over, and keep it that way
Simpler error logging
Add 8 cards
Fix some card typos
Add scoresheet to game-over screen
Prevent players from disappearing from scoresheet after game is over and they leave
Show goal score, timeouts, and password when mouseover the room name