jupyter-flex command line app not responding to ctrl-c on Windows

[jmp75]

Minor issue, but may be troubling for some users. I noticed that on Windows if jupyter-flex is started and running on the default port, but not accessed by a browser, the command line app is not terminating when CTRL-C is sent.

If triggering an access to localhost:8866 from a browser, however, immediately the server stops.

[jmp75]

It may be a Voila issue rather than jpt-flex.

[danielfrg]

We removed the cli on 0.9.0 so if this happens its voila now.