When splitting a stack of item, if you select the max amount of items in the stack, the correct max amount gets moved in the other slot but the previous slot still shows the icon (although the item doesn't seem to exist in terms of value/weight).

The behaviour should emulate the WoW item behaviour. If it is possible to select the max amount, the previous slot should be cleared. If it isn't possible and the max size of the split stack is max - 1, code should be changed accordingly.

Test items : https://pastebin.com/AJAtDjKx
Before splitting :

After splitting :