Fixed a bug where sorting your inventory would not work in certain scenarios
Fixed a bug where you could manage to put a backpack inside another backpack or shulker box

Added more functions. Now you can store shulker boxes in the backpacks but not the other way around!

Added two new tiers for upgrading as well as reworked all the crafting recipes to make it better fit for standard survival gameplay. Fixed bug where you could store shulkerboxes inside backpacks and backpacks inside shulkerboxes, providing infinite storage. Fixed bug where the backpacks sometimes would stop working. Optimized storage saving and loading, still WIP. Added a toolbar ontop the backpacks for further development