* Made levels with TOL_COOP inaccessible from the multiplayer map select...

* Made levels with TOL_COOP inaccessible from the multiplayer map select unless you'd visited them in singleplayer (mapvisited, saves to gamedata) or visited a Co-op level number equal to/after it (multiplayer, doesn't save to gamedata)
* Tweaked Pandora's box to add:
 - A mid-game link to the Addons menu.
 - A button to give everyone SF_SUPER (except Tails in non-devmode executables).