gettext and markup fixes
SSH cleanup and fixes

Removed deprecated functions of libssh and obtain public key
from private key file. Fixes #262.
Fix label too large that was preventing input on field
Fixes #223: correctly set host CertificateName when in SSH tunnel.
Remove unneeded debug line
Merge branch 'gtk3' of https://github.com/FreeRDP/Remmina into gtk3