As Rangers gained safe passage to the Scottish Cup Final, the performance of Jack Butland was almost an afterthought. With Cyriel Dessers and Todd Cantwell stealing the headlines at Hampden, the 31-year-old’s heroics in front of goal have been somewhat skimmed over in the analysis. But far from be an insult to the yet another massive performance in a big game for Jack Butland, it’s a testament to his progress at Rangers. Super Jack has gone to another level in the eyes of Ibrox fans, and Scottish football as a whole, with his extraordinary saves becoming, well, ordinary. The spectacular is rou…