Server name/port CLI and websockets

[jburel]

When connecting using websockets using omero login
one will enter for the Server input something like wss://outreach.o.org/omero-ws or wss://outreach.o.org:port/omero-ws
After a successful connection, when connecting again
the entry for Server will be Server: wss://outreach.o.org/omero-ws:4064. This will fail and force the user to re-enter the host name

cc @pwalczysko