title: Django 1.4 SimpleListFilter 'selected' option issue
body: <p>I have written a SimpleListFilter, here is the code:
  <a href="http://dpaste.com/639578/" rel="nofollow noreferrer">http://dpaste.com/639578/</a></p>
  
  <p>It displays in the admin list properly, but i am having an issue, The selected option does not get highlighted in the custom filter. Only 'All' highlights but not the custom options. Here is the screenshot to illustrate that:</p>
  
  <p><img src="https://i.stack.imgur.com/tU4Y4.png" alt="http://imgur.com/IyrYk"></p>
  
  <hr>
  
  <p>If anybody interested in this, here is the follow up:
  <a href="https://code.djangoproject.com/ticket/17091" rel="nofollow noreferrer">https://code.djangoproject.com/ticket/17091</a></p>