Function UnitDropItemSlot

Moves an item inside unit's inventory to specified slot. If this slot contains an item, their positions are swapped.

This is the same as if you'd right-click an item in game to move it to a different slot.

Returns:

• true if the move was successful, even if moving an item to its current slot (no change)
• false if unit/item invalid, item not in inventory, invalid item slot specified