Fix spec for sr-Latn (#7203)

app/controllers/concerns/localized.rb

@@ -29,10 +29,14 @@ module Localized
   end
 
   def preferred_locale
-    http_accept_language.preferred_language_from(I18n.available_locales)
+    http_accept_language.preferred_language_from(available_locales)
   end
 
   def compatible_locale
-    http_accept_language.compatible_language_from(I18n.available_locales)
+    http_accept_language.compatible_language_from(available_locales)
+  end
+
+  def available_locales
+    I18n.available_locales.reverse
   end
 end