title: How to display a custom verbose_name on a GenericForeignKey in Django admin
body: <p>I would like to display a custom field name (perhaps translated) for a <code>GenericForeignKey</code> field of a model in <strong>Django admin</strong>.</p>
  
  <p>Unfortunately, a <code>GenericForeignKey</code> does not accept <code>verbose_name</code> (at least in Django 1.6), so how would I actually add a custom name in the admin?</p>