title: Django 1.8 show_change_link in inline not showing links
body: <p>I added show_change_link = True to an inline in Django 1.8, but the links are not added to the inlined items. Every model in the app is registered in the admin. Am I missing something? I can only find one sentence regarding this feature in the documentation.</p>
  
  <p>EDIT:</p>
  
  <pre><code>class TheInline(admin.TabularInline):
      model = TheModel
      readonly_fields = ['timestamp']
      extra = 0
      show_change_link = True
  </code></pre>
  
  <p>I am not using any custom admin like grappelli, and all the models in the app are registered in the admin.</p>