By Jon Robinson The boss of Manchester’s Co-op Live arena has been promoted after leading its recovery following a disastrous launch earlier this year. Rebecca Kane Burton took over the reigns at the £365m arena by Manchester City’s Etihad Stadium in April after its previous boss resigned after a series of problems and delays generated national headlines. Gary Roden quit his role days after comedian Peter Kay’s opening shows were cancelled as it became clear that the venue was not ready in time. There was also a backlash over Mr Roden’s comments to the BBC that some small music venues were “po…