Merge remote-tracking branch 'upstream/stable-4.4' into HEAD

Conflicts:
- `app/views/layouts/application.html.haml`:
  Conflict because of glitch-soc's theming system.
  Updated the line as upstream did.

app/models/user.rb

@@ -142,7 +142,9 @@ class User < ApplicationRecord
   delegate :can?, to: :role
 
   attr_reader :invite_code, :date_of_birth
-  attr_writer :external, :bypass_registration_checks, :current_account
+  attr_writer :external, :current_account
+
+  attribute :bypass_registration_checks, :boolean, default: false
 
   def self.those_who_can(*any_of_privileges)
     matching_role_ids = UserRole.that_can(*any_of_privileges).map(&:id)
@@ -505,10 +507,6 @@ class User < ApplicationRecord
     !!@external
   end
 
-  def bypass_registration_checks?
-    @bypass_registration_checks
-  end
-
   def sanitize_role
     self.role = nil if role.present? && role.everyone?
   end