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

app/views/follower_accounts/index.html.haml

@@ -7,4 +7,7 @@
 
 = render 'accounts/header', account: @account
 
-= render 'accounts/follow_grid', follows: @follows, accounts: @follows.map(&:account)
+- if @account.user_hides_network?
+  = render 'accounts/follow_grid_hidden'
+- else
+  = render 'accounts/follow_grid', follows: @follows, accounts: @follows.map(&:account)