To all my felling touch bar owners, just got mine and typing for the first time. While setting up my finger print, I noticed that the finger scanner makes a little noise when I raise and lower my finger. I cannot tell if it is loose or that it's just a different material not as connected to the machine as well as the touch bar? And as I am typing this, I just realized it's also a button DUH.... So to confirm? it's a button obviously, and has a little play to it? thanks!