title: Django mptt admin category
body: <p>I am using the basic configuration for Django Mptt Admin </p>
  
  <pre><code>from django.contrib import admin
  from mptt.admin import MPTTModelAdmin
  from teklifpark.categories.models import Category
  
  admin.site.register(Category, MPTTModelAdmin)
  </code></pre>
  
  <p>But in the admin panel I cannot view category names. I can create but while choosing the parent category in the drop down box I can only view Category Object instead of name of the category how can I fix it. </p>