Comment 5 for bug 988633

Would an easy fix to essex be to just remove the 'is_public': True from:

https://github.com/openstack/horizon/blob/stable/essex/horizon/dashboards/nova/images_and_snapshots/images/forms.py#L74

There is no way to edit an images public status anyway so just maintaining it's current value would be better than setting it to public