title: Make boolean values editable in list_display?
body: <p>I'd like a boolean field to be editable in my Django admin's list display. Instead, I have uneditable icons:</p>
  
  <p><img src="https://i.stack.imgur.com/E0Krv.png" alt="enter image description here"></p>
  
  <p>My code looks like this: </p>
  
  <pre><code># Model
  class Task(models.Model):
    ...
    is_finished = models.BooleanField() 
  # Admin
  list_display = (..., 'is_finished')
  </code></pre>
  
  <p>I haven't included <code>is_finished</code> in the <code>readonly_fields</code> tuple in <code>admin.py</code>, so I'm surprised that it isn't editable by default. What am I doing wrong?</p>