move to ajax function for every direct debit xml download

config/routes.rb

@@ -155,13 +155,13 @@ Rails.application.routes.draw do
     resources :group_order_invoices do
       member do
         patch :select_sepa_sequence_type
-        patch :toggle_payed
+        patch :toggle_paid
         patch :toggle_sepa_downloaded
       end
       collection do
         patch :select_all_sepa_sequence_type
         patch :toggle_all_sepa_downloaded
-        patch :toggle_all_payed
+        patch :toggle_all_paid
       end
     end