Fix avaritiaddons chest voiding issue in GUI

[brachy84]

Mod: https://www.curseforge.com/minecraft/mc-mods/avaritiaddons
This method should call super.onContainerClosed(player). Since thats where the current held item is dropped. If thats not called the current held item is simply voided. However the item is dropped after opening any (?) completly unrelated ui and closing it. I assume its some client, server desync thing, but im not sure. Might be truly voided on dedicated servers.