Reduce the size of the icon sprite

[turban]

The icons in the sprite are much larger than they need to be:
https://github.com/kartverket/kartverket.vectortiles/blob/main/style/landtopo/landtopo.png
https://github.com/kartverket/kartverket.vectortiles/blob/main/style/landtopo/landtopo%402x.png

Could the size be reduced to save some bandwidth and to make it easier to combine different sprites?
Ideally the icon size should be 1-to-1.

[turban]

We found an issue with Safari on iPhone - it seems that it's not capable of using the big sprite. Icons are not showing on the map when testing: https://kartverket.github.io/vectorTilesDemo/

So sprite width x height can't exceed 16.777.216