Added Group.is_empty() method
Added Group.is_empty() method

glic3rinu/django-admin-tools,glic3rinu/django-admin-tools,glic3rinu/django-admin-tools,artscoop/django-admin-tools,artscoop/django-admin-tools,artscoop/django-admin-tools,glic3rinu/django-admin-tools,artscoop/django-admin-tools