Add preference to hide following/followers lists (#7532)

* Add preference to hide following/followers lists

- Public pages
- ActivityPub collections (does not return pages but does give total)
- REST API (unless it's your own) (does not federate)

Fix #6901

* Add preference

* Add delegation

* Fix issue

* Fix issue

config/locales/en.yml

@@ -40,6 +40,7 @@ en:
     following: Following
     media: Media
     moved_html: "%{name} has moved to %{new_profile_link}:"
+    network_hidden: This information is not available
     nothing_here: There is nothing here!
     people_followed_by: People whom %{name} follows
     people_who_follow: People who follow %{name}