Can't close the tournament editor tab because it overlaps with the buttons to close the entire application.
(Yes, I know I can close it by leaving or finishing the tournament, or even by closing other tabs first, that's not the problem, but it looks bad and isn't very user friendly. It shouldn't happen.)
...heh, I spoke too soon, the tab stayed open even when I left the tournament. I don't think the tournament editor should be accessible when you aren't in a tournament, I would consider this a bug.
btw, "leave tournament" button tends to show "collect prizes" instead if you already played a tournament before the current one and there are no prizes to collect.
...oh, and I didn't get my promotional card when I left the tournament. Is that not rewarded for 0 wins? If yes, we shouldn't be forced to play a round and surrender to receive it.
PS : If it doesn't get fixed soon, I might take a look at it myself though I haven't yet investigated tournament related code so it won't be easy. To fix the tab closing problem however, renaming it "draft editor window" should probably work, the problem is "tournament" is too long.