Change to ssh key handling for registered APT/Cloud users; show the ssh key
box, but as a collapsible. Warn user if they do not have a key (provided on signup page) that they are restricted to browser shell. Whenever user provides a key, replace in the database (if its changed). This keeps the user out of the Emulab interface to edit their ssh keys. Might have to revisit this if APT/Cloud users need/want more then the one key.
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