Celtic only announced one deadline day signing in the form of Adam Idah to cap off an otherwise muted window at Parkhead. With roughly an hour before the close of play, the Republic of Ireland international sealed a loan switch to the Bhoys for the remainder of the campaign. Nevertheless, his agreement doesn’t contain an option to buy, and it will remain to be seen whether the 22-year-old will stay in Glasgow long-term. Coming off the bench for his debut away to Aberdeen on Saturday, Idah made a marked impact on proceedings, showing composure to slide in Nicolas Kuhn, who salvaged a 1-1 draw a…