Law firm managing partners have waning confidence in the legal market’s recovery. That’s according to a quarterly survey released Tuesday that showed a dip in confidence among a group of 72 firm leaders since the last survey from January. But one quarter does not make a trend. It was the first retreat in the confidence level in five quarters for the Citi Private Bank survey — and the level of optimism remains far above the depths it hit in the immediate wake of the financial crisis. “I …