Updates the Field Item Editor to render layers based on the entire map, and the per-patch positioning of each layer.
Import/export will gracefully handle upgrade/downgrade, and viewport import/export will gracefully update tiles rather than a per-acre basis.
Performance has also been slightly improved; no allocation is done anymore when updating the image.
* Fix loading player house and room dumps
* Check converted house/room data lengths rather instead of the imported dunmp's
* Fix downgrading player house format
Setting a field item with the snap active will align it to the major gridlines. This will prevent the user from setting un-interactable objects (rocks, trees) unintentionally.
Having the auto-handle extension tiles will now delete all associated tiles when issuing a delete command on an extension tile, rather than just deleting the extension tile.
