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

Conflicts:
- app/views/admin/pending_accounts/index.html.haml
  No real conflict, upstream changes too close to glitch-specific
  theming system changes.
- config/navigation.rb
  Upstream redesigned the settings navigation, took those changes
  and re-inserted the flavours menu.

config/locales/simple_form.en.yml

@@ -41,6 +41,8 @@ en:
         name: 'You might want to use one of these:'
       imports:
         data: CSV file exported from another Mastodon server
+      invite_request:
+        text: This will help us review your application
       sessions:
         otp: 'Enter the two-factor code generated by your phone app or use one of your recovery codes:'
       user:
@@ -120,12 +122,15 @@ en:
         must_be_follower: Block notifications from non-followers
         must_be_following: Block notifications from people you don't follow
         must_be_following_dm: Block direct messages from people you don't follow
+      invite_request:
+        text: Why do you want to join?
       notification_emails:
         digest: Send digest e-mails
         favourite: Send e-mail when someone favourites your status
         follow: Send e-mail when someone follows you
         follow_request: Send e-mail when someone requests to follow you
         mention: Send e-mail when someone mentions you
+        pending_account: Send e-mail when a new account needs review
         reblog: Send e-mail when someone boosts your status
         report: Send e-mail when a new report is submitted
     'no': 'No'