refactor: use django.apps instead of INSTALLED_APPS setting
refactor: use django.apps instead of INSTALLED_APPS setting

sshwsfc/xadmin,alexsilva/django-xadmin,alexsilva/django-xadmin,sshwsfc/xadmin,alexsilva/django-xadmin,alexsilva/django-xadmin,sshwsfc/django-xadmin,sshwsfc/xadmin,sshwsfc/xadmin,sshwsfc/django-xadmin,sshwsfc/django-xadmin,sshwsfc/django-xadmin