title: Breadcrumbs in custom admin view (Django)
body: <p>I have custom admin view which works fine, except that I would like to add breadcrumbs.</p>
  
  <p>Up to now I only see "Start". But I would like to see "Start > Foo".</p>
  
  <p><a href="https://i.stack.imgur.com/OPjCS.png" rel="noreferrer"><img src="https://i.stack.imgur.com/OPjCS.png" alt="django-admin-breadcrumbs"></a></p>
  
  <p>What do I need to add to my template?</p>