Changes to Pathauto

I've reviewed the current state of the pathauto module. 
As I'm new to D8 development, I did some minor changes I saw during the reading of the code.
We should. This code is kind of pointless in D8, at least with seven, because the new seven UI doesn't display it anymore. But core still has it everywhere too and is displayed if you use the frontent theme, unless that replaces it too.