Update net.newbieshell.client.menu

* Major overhaul: There is now a real menu, as said on the tin. This has not been true before 0.1.6.
* Major overhaul: Singleuser has been abolished in a technical sense; it is now really connecting to 127.0.0.1.

Signed-off-by: BrotherEdison <brotheredison@outlook.com>