We had some styles in the config forms for <ul> and <li> tags that

were quite intrusive. It's not entirely clear what they were originally

for, but likely it was for checkbox rows. This change cleans those up,

simplifies them, and moves them into the .checkbox-row selector.

Looked throughout all our pages with config forms, testing for regressions.

Couldn't find any.
Tested that this fixed some visual issues found with embedding condition

fields into a config forms page.