ITEM UPGRADE MASTER SET ITEM

Fires after adding or removing items in the ItemUpgradeFrame used for item upgrading.
 ITEM_UPGRADE_MASTER_SET_ITEM
==Payload==
None
==Details==
* Fires up to twice when the ItemUpgradeFrame closes; presumably forcing the slot clear.
* Causes the frame to update its appearance using information provided in 
==Patch changes==
==References==