Fix old box contents carrying over when starting a new game by means other than the New Game option (i.e. Once Again, Restart, Wesker Mode)
Fix selection sound not playing when scrolling to the next row in the box
Fix an issue where scrolling up in the right column of the box could result in half of a two-slot item being selected
Moving the selection left from the first slot or right from the last slot will now scroll to the previous/next row of the box, consistent with the base game's behavior