Solo play, invite only and party

[signal bane]

new game modes:
Solo
invite only - we need this one because every time some random people join withount your agreement
and party to start dungeons with everyone at same time

also an block system to prevent someone from joining you, because even when we delete someone this person keep joining while he restarts the game, since the friends list only updates when you restart the game, even when someone deletes you or vice versa