Fix collapse function at upload form.
Fix collapse function at upload form.

The `collapse close` value was present in the HTML, but the Django admin
jQuery scripts were not loaded properly, hence the help box was always
visible.

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