[Enhancement] Add back removed third save slot

[SuperBro64]

As described on this page, the original Japanese version of Majora's Mask had three save slots, like in Ocarina of Time, but you could only save your game by playing the Song of Time, as Owl Statues were only used as warp points.

The subsequent US version of the game, meanwhile, made saving easier by allowing quicksaving at Owl Statues, but this required removing the third save slot in the process.

Now that Majora's Mask is available as a PC port with 2Ship and not limited by the original hardware, I think it would a cool enhancement if the third save slot could be added back in, if possible.