Fix InvalidMove error
Fix InvalidMove error

Any admin forms with a TreeForeignKey should extend from MPTTAdminForm - otherwise the parent field will show choices which aren't valid

blancltd/django-glitter,developersociety/django-glitter,blancltd/django-glitter,blancltd/django-glitter,developersociety/django-glitter,developersociety/django-glitter