Ensures metaboxes are collapsible in various Administration screens

When editing an activity, editing a group or editing a profile from the corresponding WordPress Administration screens, metaboxes are now fully collapsible.

Fixes #5364

git-svn-id: https://buddypress.svn.wordpress.org/trunk@8030 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
POT, generated from r8030

git-svn-id: https://buddypress.svn.wordpress.org/trunk@8031 cdf35c40-ae34-48e0-9cc9-0c9da1808c22