Add state CSS classes to xprofile field visibility toggles and settings divs

This gives themers greater control over the behavior of these elements, by
telling them which "state" they're in.

Fixes #5498

Props hnla

git-svn-id: https://buddypress.svn.wordpress.org/trunk@8409 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Pinking shears

git-svn-id: https://buddypress.svn.wordpress.org/trunk@8410 cdf35c40-ae34-48e0-9cc9-0c9da1808c22