Rangers are on the verge of relinquishing their ‘World’s Most Successful Club’ tag as Celtic’s Scottish Cup victory draws the green side of Glasgow level on major honours. In a tentative affair, Rangers and Celtic looked to be heading to extra time at Hampden only for Adam Idah to react quickest when Jack Butland fumbled Paolo Bernardo’s long-range effort in the 90th minute. The match was overshadowed by yet another questionable Old Firm VAR decision which went in Celtic’s favour against Rangers. With referee Nick Walsh now firmly at the centre of a post-match inquest, Rangers are counting the…