PlaceItem/PlaceItemCell/PlaceAt should work with levelled creatures

There is a fab_cent_fight_watch script in Tribunal, which has such instructions:

PlaceItem "in_dwe_all_tribunal" 4791 6127 12288 0
PlaceItem "in_dwe_all_tribunal" 6246 3234 12288 0

in_dwe_all_tribunal is a levelled creatures list. In vanilla such commands resolve levelled list and spawn creatures, while in OpenMW they break script execution:

Execution of script fab_cent_fight_watch failed: unable to copy class to cell

That's because copyToCellImpl is not implemented for CreatureLevList class.

Interesting that PlaceItem and PlaceItemCell do not support levelled items in vanilla engine, only levelled creatures.