fix jquery-ui-sortable path

app/views/admin/members/edit_order.html.erb

@@ -20,7 +20,7 @@
 </div>
 
 <% content_for :page_specific_javascript do %>
-  <%= javascript_include_tag "jquery.ui.sortable" %>
+  <%= javascript_include_tag "jquery-ui/sortable" %>
   <%= javascript_include_tag "lib/jquery.ui.touch-punch.min" %>
   <%= javascript_include_tag "lib/jquery.lite.image.resize" %>
   <%= javascript_include_tag "lib/member/sort" %>