Makes sure the /wp-admin BuddyPress profile stays in the "edit other users" context.

The patch also checks the /wp-admin BuddyPress profile screen is requested before loading the needed javascript.

Fixes #5365

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7784 cdf35c40-ae34-48e0-9cc9-0c9da1808c22