Map option: hide tile

Just a simple little thing: an extra command on the map screen that overlays a field tile on top of the original tile so that it no longer appears. It’d be pretty useful in later stages of the game when you’ve done quite a bit of looting but don’t want a whole crapton of notes cluttering your map screen saying “CLEARED” indicating which places you’ve cleaned out. Maybe have it reflect on the mini-map as well? That’d be nice. And if you make a mistake, just use the hide tile command on a masked tile and it’ll appear just like before, no worries.