title: Adding link to django admin page
body: <p>I have a client that has an app built with django. On every page of
  their app is a link to their admin site. They tell me the admin site
  is generated entirely by django, and they've never customized it
  before. On the very first line of the admin page it says:</p>
  
  <pre>
  Django administration          Welcome, admin. Change password / Log out
  </pre>
  
  <p>They want me to add a link to that line, to the left of "Django
  administration" that will take them back to the page they were on when
  they clicked on the link to get them to the admin site.</p>
  
  <p>So I have 2 issues here:</p>
  
  <ol>
  <li><p>How do I override that line to add the link? It appears that page
  is generated by contrib/admin/templates/admin/base.html, and I tried
  to override it by following the directions at
  <a href="https://docs.djangoproject.com/en/1.2/ref/contrib/admin/#overriding-a">https://docs.djangoproject.com/en/1.2/ref/contrib/admin/#overriding-a</a>...,
  but whatever I do seems to have no effect.</p></li>
  <li><p>How can I get the link of the page of the app they came from? It's
  not simply just going back one page, as they could have navigated all
  over the place of the admin site before clicking the "Back to app"
  link.</p></li>
  </ol>