title: Sorting in django-smart-selects
body: <p>I have implemented interdependent dropdowns using django-smart-selects. By default the entries in the dropdown are sorted in alphabetical order, which is fine. However, I need to have the entry with the text "other" to show up at the very end of the dropdown. </p>
  
  <p>Is there a simple way of doing this in django-smart-selects? </p>