[Bug] Only display 'server info' screen on first join
When a player joins the server, they are greeted with the "Server Info" dialog. This dialog shows every time the player joins the server, rather than just the first time. Repeat players are likely to be power users, and will not want to see this every time.
NOTE: Regarding the future data persistence module: the dialog should appear the first time a player joins a new game. This means that if you join the server after a reset even with the data persistence mod, that the dialog should still show up.