Rangers won their second league game in a row yesterday at what is hopefully the start of a long unbeaten run. But the challenge is now to ensure that consistency in performance and results does in fact come. That is what will change the atmosphere around the place and get fans thinking that this squad and manager can get themselves on the right track. Grinding out wins when not at your best is a start but the support want to see a level of performance too. Hearts could have got something out of the game at Ibrox yesterday and the Gers team do deserve credit for hanging on. But improvements wi…