Extend //setbiome to set it for all layers instead of creating 3d biome

[Uight]

So recently i tried to change some biomes around and had huge problems due to the new 3d biomes posibility. Problem was i first started and only set the biome for 2 layers and then i later wonder what happend and did another 1 layer until i realized i had to //expand vert everytime

There should therefor be any kind of solution or extension like -ev for the command so it automativly applies to the whole amount of layers like the old version did.

[octylFractal]

What's the problem with using //expand vert? I don't think we should have two ways to do the same functionality.

If we did implement this, it would probably be a session toggle, not a flag on each command. Double-letter flags are not valid, and I'm not sure it's worth using -v just for biomes, when that could have other vertical implications (this flag would also have to be added to paste and regen)

[Uight]

There is no problem with it as i described above it would just be a usability improvment as i needed to swap command around 400 times between //setbiome and //expand vert

[octylFractal]

Accepting this as we need an option for /brush biome as well, so we might as well use the same one for both commands.