removed hidden input field that wasn't referenced anywhere
removed hidden input field that wasn't referenced anywhere

get_absolute_url can be quite costly in some cases where the URL
of a node depends on the URL of the parent node

velfimov/django-treeadmin,piquadrat/django-treeadmin,velfimov/django-treeadmin,nephila/django-treeadmin,piquadrat/django-treeadmin,nephila/django-treeadmin,extertioner/django-treeadmin,barseghyanartur/django-treeadmin,velfimov/django-treeadmin,extertioner/django-treeadmin,piquadrat/django-treeadmin,extertioner/django-treeadmin,barseghyanartur/django-treeadmin,barseghyanartur/django-treeadmin,nephila/django-treeadmin