Make sure popup windows hide the header/footer.
Make sure popup windows hide the header/footer.

The filebrowser did pass the 'pop' parameter,
but didn't pass that to the Django-admin templates.

kcsry/django-filebrowser-no-grappelli,haight6716/filebrowser,UGentPortaal/django-filebrowser-no-grappelli-django14,djkartsa/django-filebrowser-no-grappelli,kcsry/django-filebrowser-no-grappelli,kcsry/django-filebrowser-no-grappelli,UGentPortaal/django-filebrowser-no-grappelli-django14,haight6716/filebrowser,brightinteractive/django-filebrowser-no-grappelli,UGentPortaal/django-filebrowser-no-grappelli-django14,djkartsa/django-filebrowser-no-grappelli,djkartsa/django-filebrowser-no-grappelli,brightinteractive/django-filebrowser-no-grappelli,brightinteractive/django-filebrowser-no-grappelli