Force round winner to become next card tsar

[pidg]

15:34 <+taras> i have an idea for PAH
15:34 <+taras> nobody enjoys being the card tsar, so it should make the winner
of the last round the card tsar
15:34 <+taras> this also takes them out of the running to give everyone else a
chance
15:35 @grifferz can you add it as an issue please