title: Django admin raw_id_field popup with search box
body: <p>I have foreign key field with multiple items and it's really hard to find needed values.</p>
  
  <p>Is there any solution to add search to admin's raw_id_fields popup? Or any alternative from core django package?</p>
  
  <p>If there is no solution I'll use this one (<a href="https://github.com/yourlabs/django-autocomplete-light" rel="nofollow">https://github.com/yourlabs/django-autocomplete-light</a>) but I want to avoid external dependencies.</p>