Shelf Capabilities

I really like the concept of hot-swapping your hotbar using shelves. But there are some tweaks I would like to see.

1.) I would like to see a way to expand it beyond the hotbar. Like, I would like the ability to stack multiple rows of shelves which reach into the 1st, 2nd, and 3rd rows of your inventory. I would imagine it would index off of the bottom left of your hotbar, so you could create a 3x4 grid of shelves which represent your whole inventory + hotbar?

2.) I would like the ability to fill up and empty the shelves so that I can basically swap out my whole inventory - my basic tools, then go back to mining and have the shelves empty back to a "default" state with new food, torches, etc.

If we have multiple rows of shelves like in my 1st suggestion. We would need another way of draining items out of the shelf besides a hopper. Maybe you could add a feature where you could "bump" the shelf with a piston and the items fall out of the front?, then just fill it back up with a hopper pointed into the back of it?

Anyway, I think this feature has a lot of potential to help the inventory problem.