Changed clock to perf logic to match with that of lila #49
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Closes #48 . Correspondence games might still be guessed incorrectly. The logic was taken from https://github.com/lichess-org/lila/blob/a91335d86a260f02f8a334f857665491b4e19c87/ui/lobby/src/setupCtrl.ts#L26-L27 . While checking most of the games were shown correctly in search except one ¼+20 (Rapid) I am not sure why. But others are correct.
Thanks fitztrev for their help.