Have separate "class list" configurations for sections vs regions

I tested this and works as stated. I've patched 2.0.x

• Add the new Section region CSS classes to choose from input
• Copies class_list to region_class_list on updatedb

I am adding a patch from the Issue fork that I am using with my composer patches.

Adding a couple of image:

1. Layout Builder tray with region specific classes
2. Layout configure with copied section classes