SSH Authenticator key upload fails for non-privileged CoPerson

The add.ctp view for SshKeys creates a form with action

/registry/ssh_key_authenticator/ssh_keys/add/authenticatorid:1/copersonid:8068

but the view also includes the file fields.inc and that file also creates a form with action

/registry/ssh_key_authenticator/ssh_keys/addKeyFile

That action is missing the authenticator and coperson named parameters.

Firefox 70.0.1 uses the second action without the named parameters when the UPLOAD button is clicked and so the named parameters are not passed into the controller. As a result the calculated permissions are not correct and the POST is rejected, particularly when the user has no special permissions (is not a CO admin or COU admin).

This behavior is seen in the current develop branch, which is at

c082d8f99276ea3c021c428816097a14ef3f7205