Make displaying application used to toot opt-in (#9897)

* Make storing and displaying application used to toot opt-in

* Revert to storing application info, and display it to the author via API

app/views/settings/preferences/show.html.haml

@@ -34,6 +34,9 @@
   .fields-group
     = f.input :setting_hide_network, as: :boolean, wrapper: :with_label
 
+  .fields-group
+    = f.input :setting_show_application, as: :boolean, wrapper: :with_label
+
   %hr#settings_web/
 
   .fields-row