Pick-Block Air to Clear Your Hand

You should be able to pick-block air to clear your hand.

I like to play with an empty hand. It just feels right. But when my hotbar is full, I always have to open my inventory and make a free space manually. It's not such a big deal, but I thought it'd be nice to have a way to clear your hand automatically. So what if you could just use the pick-block key? It's a natural extension of the pick-block functionality. 

It works exactly the same as picking a block currently does:

• When you pick-block facing empty space, you automatically select an empty hotbar slot.
• If your hotbar is full, the item you're holding is moved into a free spot in your inventory.
• If you're holding a tool, the game will prioritise moving any blocks in your hotbar instead.
• If your inventory is totally full, nothing happens.
• (Using pick-block on a block you don't possess will not empty your hand.)

It's just like you're picking empty space out of your inventory. It's a simple suggestion I feel would make gameplay just a little smoother.