Allow selection of multiple accepted items in GUI Slots

Upvotes: 4
Issue description

Just like shulker boxes, we cant put shulker boxes in shulker boxes. It would be great we can make that with custom backpacks. 

Like I want that we cant put shulkers in backpacks or small backpacks in big backpacks.

Issue comments

we cant put shulker boxes in shulker boxes

I think we can't put a shulker box inside another shulker box.

Donate to MCreator

By donating to developers you can speed up development, as with more resources, we can dedicate more time to MCreator. It is a free project made by developers working on it in their free time.