Celtic are ramping up their transfer activity with a couple of weeks of the window remaining as supporters wait on tenterhooks for incomings. Yesterday, Adam Idah became the Bhoys’ fourth capture of the summer. He joins Kasper Schmeichel, Viljami Sinisalo and Paulo Bernardo at the club, and more additions are set to follow. Midfield is believed to be an area where bodies will be added. Reports suggest that Celtic have Augsburg’s Arne Engels on the radar as one of their top targets before the transfer deadline. Wataru Endo of Liverpool has also been mentioned. However, you get the impression he…