Ref T5833. I want to add SSH keys to Almanac devices, but the edit workflows for them are currently bound tightly to users.

Instead, decouple key management from users and the settings panel.

• Uploaded, generated, edited and deleted SSH keys.
• Hit missing name, missing key, bad key format, duplicate key errors.
• Edited/generated/deleted/etc keys for a bot user as an administrator.
• Got HiSec'd on everything.