uasort(): Returning bool from comparison function is deprecated

Please let's also test on non-deprecated project themes. GIN is a good-to-go now.

Moving to critical since Seven has been deprecated as the admin theme and so far is either Claro or Gin the way to go on the adming themes side, i consider this to be a blocker.

I just tested on Gin admin D10.1 and Php 8.1.13 and works. However cannot see back and submit button but not sure if it is related to this.