Removes VNC Close menu.
Removes VNC Close menu.

No longer needed as we now create separate windows.
Fixes #37

simphony/simphony-remote-docker,simphony/simphony-remote-docker,simphony/simphony-remote-docker,simphony/simphony-remote-docker,simphony/simphony-remote-docker,simphony/simphony-remote-docker,simphony/simphony-remote-docker,simphony/simphony-remote-docker