 have only one inventory, and no reserved slots in the quickbar. To solve that, we just extended the "principal" of the hand. When you pick something from the inventory, the hand icon appears on the slot. As long as you hold the thing in your cursor, the hand stays there, and prevents other things from being inserted there. This way, you should always be able to return the currently selected item into your inventory as long as you didn't get it from external source like a chest. </p>
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