New update

- Fix $profile_activity_privacy_levels  and
groups_activity_privacy_levels  arrays.
- check if bp components 'groups/friends' are enabled.
- Add position param for $profile_activity_visibility_levels and
groups_activity_visibility_level arrays to make selectbox sortable.
- Add Integration code for Buddypress Activity plus and Buddypress
Followers Plugins.
- Add more filters to make Buddypress Activity Privacy Extensible