If we connect to a server and receive a "login failed" message and we haven't got a password, popup to ask the user.
Make it throttled and a configurable option (that can be toggled from the popup) to prevent being DoSed by fake local mDNS servers swarming us.
Maybe we shouldn't even try to login if there are no ssh keys and no password.. (alert user? or ask for password?)

test_unhex_str()=('t', 'e', 's', 't')
Should be = 'test'

If the account has an SSH key defined, we can just add it to the list of authorized keys on the server rather than storing the password.
shifter_add_key SHIFTER_KEY, SSH_KEY
This is the public key, so we need the UI widgets to point to the public key as well as private key. Windows keys generated by puttygen.exe must be converted on the server via "ssh-keygen -i"