uc_order entity keys are WRONG

In uc_order_entity_info:

    'entity keys' => array(
        'id' => 'order_id',
        'label' => t('Order'),
      ),

But documentation states that "label" inside the entity keys definition should be:

label: The name of the property that contains the entity label. For example, if the entity's label is located in $entity->subject, then 'subject' should be specified here. If complex logic is required to build the label, a 'label callback' should be defined instead (see the 'label callback' section above for details).

This makes any code that relies on "label" being a real property completely broken. Such as the entity reference module, or even parts of Core.

I've fixed this on a hook, just wanted to report here that t('Order') should be either:

* Completely removed
* Replaced by a property of the order (such as order_id)
* Removed + Add a "label callback"