Suggestion: Ability to save and hotkey block selection bar states

[mstefarov]

It would be great for builders to be able to hotkey certain configurations of blocks, e.g. when working on different parts of buildings. This could be done by some command-key combination and number keys, e.g. Ctrl+1 through Ctrl+9

It would be even better to allow servers to query or set these block selection bar states via CPE packets, e.g. to restore player's old bar when they reconnect to server where they were building.