/listalias doesn't scale coordinates for the nether.

[Anna Bakker]

Similar to #252, /listalias displays how far away you are from a alias from your current coords. It does show if a alias is in the nether though.

It should scale distances similar to /nearestwarp does (see #252).

Two screenshots showing me using /listalias in the overworld and nether at the alias BatugusPortal:

[Riot]

various improvements and fixes by Anna, should resolve #301, #302, #305 and #306

→ <<cset aa5998e0323f>>