* Change min/max section optimisations
* Correctly init dimension type
We need to initialise the field as early as possible in the constructor
to avoid problems.
Also, do not cache min/max section in EntityLookup. Note that mods
that implement worlds with variable heights will not work still,
as the entity slices expect a fixed height.
* Cache calculated height values
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Co-authored-by: Spottedleaf <Spottedleaf@users.noreply.github.com>
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