dillon1000/react

fix[react-devtools/InspectedElement]: fixed border stylings when some of the panels are not rendered (#30676)

Alternative to https://github.com/facebook/react/pull/30667.

Basically wrap every section in a `div` with the same class, and only
apply `border-bottom` for every instance, except for the last child. We
are paying some cost by having more divs, but thats more explicit.