Mining QOL Tings

Can a second smelting area be added please? The three current smelters are usually super busy when there are a few people mining at once.

A "Ore crate" item that we can drag ore ents in to store them, might hold less than a ccu but you can drop the whole crate of items into a smelter at once

Allow ore ents to merge into stacks when dragged against eachother