Map zoom customization

Instead of defaulting to always zooming out towards the southeast, players should be able to choose the orientation of the zoom through the cartography table interface. 

For example: this could look like a series of buttons below the map preview that allows you to incorportate the old map into the center, lower right, upper left, etc. of the new map.

Reason for change: Maps always zooming out with the original map centered in the northwest is not only impractical for mapping a wide area around the first place you mapped, the current map preview when zooming a map out shown in the cartography table ui does not represent this method at all.

Alternatively, just streamline the process of creating large, zoomed out, aligned maps somehow. Chunk snapping is an excellent feature. Thank you for adding it.