Adding link to standing orders index to orders sub-menu

app/views/spree/admin/shared/_order_sub_menu.html.erb

@@ -2,5 +2,6 @@
   <ul id="sub_nav" data-hook="admin_order_sub_tabs" class="inline-menu">
     <%= tab :orders, :match_path => '/orders' %>
     <%= tab :bulk_order_management, :match_path => '/orders/bulk_management' %>
+    <%= tab :standing_orders, :match_path => '/standing_orders', url: main_app.admin_standing_orders_path %>
   </ul>
-<% end %>
+<% end %>

spec/features/admin/standing_orders_spec.rb

@@ -18,7 +18,9 @@ feature 'Standing Orders' do
       let!(:standing_order_unmanaged) { create(:standing_order, shop: shop_unmanaged) }
 
       it "passes the smoke test" do
-        visit admin_standing_orders_path
+        visit spree.admin_path
+        click_link 'Orders'
+        click_link 'Standing Orders'
 
         expect(page).to have_select2 "shop_id", with_options: [shop.name, shop2.name], without_options: [shop_unmanaged.name]