This tweaks the selectors for the config forms list item styles to more

specifically distinguish between <li> and <tr> list items. This

helps keep some styles from applying to a <tr> that shouldn't be

there, cleaning things up quite a bit and avoiding some style

collisions.
List item actions have also been tweaked to not float if they're not in

a <li>, which gives us better control over their presentation.

Tested with both <table>-based and <ul>-based lists.