meshcache deleting themselves if the world file goes missing

[PikaGamerPro 23]

This is a pretty common problem with importing worlds, especially when working on collaborative projects this makes the whole process more stressful. If it ever realizes the world file is missing it just offs itself after saying goodnight. It'd be nice if it didn't need to delete itself in such a scenario, or at the very least add a .schematic format back, thxxx ^^