Celtic goalkeeper Joe Hart will be widely missed when he retires from football at the end of the current campaign. Now, into the final week of his professional career, Hart can bow out as a double winner if the Bhoys can topple Rangers at Hampden in the Scottish Cup final. Of course, the 37-year-old will already leave the game as a winner following Celtic’s Scottish Premiership title-winning exploits this season, and his three-year contribution was recognised at Parkhead in an emotional occasion last Saturday. The Green Brigade unveiled a stunning display early in the second half, paying tribu…