IT’S  a gleaming white stadium is the Liberty, you see it very clearly as the train snakes its way into Swansea station, and it still looks clean enough to feature on a TV advertisement for white emulsion paint. These are hopeful days in this corner of Wales. Hopeful because last season, the club was relegated after seven years in the Premier League, a period that had some highs and even a bit of silverware, the Football League Cup in 2013. They’re also hoping that under Graham Potter, the former Östersunds manager, they can regain the mojo they seemed to have lost somewhere over the past couple of years. Potter is already being linked to Aston Villa after a dozen or so games, prompting Swans…