It says a lot about the esteem in which Owen Beck is held that his role in Dundee’s 7-1 dismantling by Celtic on Wednesday night has largely been dismissed as ‘just one of those things’. A necessary – if harsh – learning curve for a full-back who the subject of a January offer from Ibrox and is likely to come into the thinking again at Rangers when Borna Barisic’s contract expires at the end of the current campaign. Owen Beck was torn limb from limb by Celtic – flying winger Yang Hyun-Jun in particularly enthralling form as Brendan Rodgers’ stuttering side blew away the cobwebs with a six-goal…