Only show the 'Edit Profile' and 'Edit Avatar' adminbar items if the
xprofile component is active.

These links are dependent on the xprofile component being active.

Fixes #5253.  Props imath.

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7592 cdf35c40-ae34-48e0-9cc9-0c9da1808c22