Use fast leaves rendering after a given distance

[muzikbike]

Request Description

This could get us some extra frames in forested areas if we could pull it off. Mipmapping makes far away leaves effectively opaque enough anyway, but since they're still handled as transparent they still use the laggier cutout rendering as well as not culling adjacent leaves and other blocks. Unsure as to whether or not this should be a toggle.

[JosephG1thub]

I thought about this too!
But I'm not sure how technically difficult this implementation is.