Order ID, Manage Display

When displaying a Registration, the Order ID field (which is added to the form by commerce_registration.module, line 733) is not configurable. This is especially bad for a site that is using both purchased registrations (using the commerce_registration module) and non-purchased registrations (using the Entity Registrations module). In this case, all non-purchased registrations are displayed as Order 0, and since this is a link, it links to a dead reference. It would be good to add a switch to the Manage Display for Registrations which allows the user to turn off this display, but it would be even better to check if the $build['#entity']->order_id was zero and not display it in this case. One last thing is that there are no tags around this display, so it is awkward to use CSS to hide it.