Friend-in-lobby indicator in main_menu lobby list

[binury]

## Steam ID
var WEBFISHING := 3146520
var my_friends := Steam.getUserSteamFriends()
for friend in my_friends:
	if friend.status == Steam.PERSONA_STATE_OFFLINE: continue
	
	var their_game = Steam.getFriendGamePlayed(friend.id)
	if their_game.empty() or their_game.id != WEBFISHING: continue
	print(friend.name)
	print(JSON.print(their_game))