Merge commit 'be991f1d18006a4820c1e9ca6625bf2bd2bfedac' into glitch-soc/merge-upstream

Conflicts:
- `app/models/form/admin_settings.rb`:
  Upstream added the notion of overriden settings, while we had extra code for
  pseudo-settings (only used to combine flavour and skin in a single select
  field).
  Ported upstream changes.
- `config/i18n-tasks.yml`:
  Upstream added `simple_form.overridden` to `ignore_unused`,
  we had `simple_form.glitch_only`.
  Added `simple_form.glitch_only` as well.

app/models/form/admin_settings.rb

@@ -3,6 +3,8 @@
 class Form::AdminSettings
   include ActiveModel::Model
 
+  include AuthorizedFetchHelper
+
   KEYS = %i(
     site_contact_username
     site_contact_email
@@ -42,6 +44,7 @@ class Form::AdminSettings
     backups_retention_period
     status_page_url
     captcha_enabled
+    authorized_fetch
   ).freeze
 
   INTEGER_KEYS = %i(
@@ -66,6 +69,7 @@ class Form::AdminSettings
     noindex
     require_invite_text
     captcha_enabled
+    authorized_fetch
   ).freeze
 
   UPLOAD_KEYS = %i(
@@ -77,6 +81,10 @@ class Form::AdminSettings
     flavour_and_skin
   ).freeze
 
+  OVERRIDEN_SETTINGS = {
+    authorized_fetch: :authorized_fetch_mode?,
+  }.freeze
+
   attr_accessor(*KEYS)
 
   validates :registrations_mode, inclusion: { in: %w(open approved none) }, if: -> { defined?(@registrations_mode) }
@@ -96,6 +104,8 @@ class Form::AdminSettings
 
       stored_value = if UPLOAD_KEYS.include?(key)
                        SiteUpload.where(var: key).first_or_initialize(var: key)
+                     elsif OVERRIDEN_SETTINGS.include?(key)
+                       public_send(OVERRIDEN_SETTINGS[key])
                      else
                        Setting.public_send(key)
                      end