Lua startingCell to return the original cell
Closes #9010 (closed).
Complements startingPosition and startingRotation in the api.
Helpful for NPCs mods that moved them out of their original cell and need to return them back.
Everytime a newly created object is placed into a cell, which includes dropping item from inventory, the startingCell of the object is set to that cell.
Edited by Alexei Kotov