Reverting back to "Huygens on the CVL".
Updating submodule version.
Reverting CVL host/connection-profile combo-box back to read-only.
Renamed cvlLoginHostComboBox and related variables to
alternative "connection profile" variable names.
Added new event for getting DBUS_SESSION_BUS_ADDRESS.
This fixes a problem where the wrong machine-id was being used
when determining the DBUS_SESSION_BUS_ADDRESS on Huygens.
(The CVL Login server's machine-id was being used instead of
the Huygens server's machine-id, causing the GVFS WebDAV mounting
to fail.)