This following is a compare between the old default interface (pre 3.21.05 on the left) and the new interface (post 3.21.05 on the right) changes are in red. Use the context & line numbers to help find your way to make the changes needed to your custom interface.
It looks like a lot of code has been taken out in some of these windows. You will notice this when you see the dark RED on the left side.