title: Django staff user can't see any application
body: <p>I have a group of user called "support". I want them to be able to log in the django admin site, view and modifiy the instances of the class "HelpContextual" of the application "support".</p>
  
  <p>So I created a group "support" with the permission <code>support | help contextual | Can change help contextual</code>. The users can log in the django admin site, but they can't see any application.</p>
  
  <p>I tried to give them all the permissions of the "support" application, but still, they can't see the support app. If I use a direct link to change a "help contextual" like this one : <code>admin/support/helpcontextual/5/change/</code>, I get a 403.</p>
  
  <p>I feel like I'm missing something obvious... Can you point it to me ?</p>