Merge branch 'master' into glitch-soc/merge-upstream

Conflicts:
- app/controllers/directories_controller.rb
- app/controllers/settings/applications_controller.rb
- app/controllers/settings/base_controller.rb
- app/controllers/settings/deletes_controller.rb
- app/controllers/settings/exports_controller.rb
- app/controllers/settings/follower_domains_controller.rb
- app/controllers/settings/imports_controller.rb
- app/controllers/settings/migrations_controller.rb
- app/controllers/settings/notifications_controller.rb
- app/controllers/settings/preferences_controller.rb
- app/controllers/settings/sessions_controller.rb
- app/controllers/settings/two_factor_authentication/confirmations_controller.rb
- app/controllers/settings/two_factor_authentication/recovery_codes_controller.rb
- app/controllers/settings/two_factor_authentications_controller.rb

Conflicts were due to some refactoring already made in glitch-soc
when introducing flavours.

app/views/layouts/public.html.haml

@@ -6,7 +6,8 @@
           = link_to root_url, class: 'brand' do
             = image_tag asset_pack_path('logo_full.svg'), alt: 'Mastodon'
 
-          = link_to t('directories.directory'), explore_path, class: 'nav-link'
+          - if Setting.profile_directory
+            = link_to t('directories.directory'), explore_path, class: 'nav-link'
           = link_to t('about.about_this'), about_more_path, class: 'nav-link'
           = link_to t('about.apps'), 'https://joinmastodon.org/apps', class: 'nav-link'
         .nav-center