Make lobbies play an audio ping when someone joins#199

Lets me tab out of the game while waiting for someone to join before I request a server.

Also send a windows alert so the program icon flashes.

And rumble controller. Just anything.

Sf6 does this.

Brawlhalla does this and it’s a great feature.

They also game the game icon on your taskbar flash yellow until you alt tab back to the game.

On a similar note we should have discord rich presence so the game is more discoverable.

Audio + visual cue planned for this in a future update :)