Philippe Clement believes Mohamed Diomande can go all the way to the top of European football while indicating that the January signing’s time at Ibrox could be the precursor to a move to a club even higher up the food chain. No fan wants to think of their beloved football team as a ‘selling club’, of course. But that’s just the harsh nature of it in the modern game, where leagues like the Dutch Eredivisie, the Belgian Jupiler League and the Scottish Premiership are often picked apart by more deep-pocketed clubs from more well-heeled divisions. Philippe Clement, formerly of Genk and Club Brugg…