tidy up javascript, remove unnecessary disableSaveOnClick

app/overrides/spree/checkout/edit/add_new_save_checkout_button.html.erb.deface

@@ -8,9 +8,10 @@
                   :class => "continue button primary large", 
                   :form=> "checkout_form_#{@order.state}" %>
   <script>
-    disableSaveOnClick();
     //Show additional button only if form attribute is supported
     if ($("#add_new_save_checkout_button input[type=submit]")[0].form)
+    {
       $("#add_new_save_checkout_button").show();
+    }
   </script>
 </div>