Ensure that TerraNeo app works for variable mesh-widthes in radial direction
At least part of the radial profile functionality that was merged with !732 (merged) is limited to the assumption that the icosahedral mesh used in the TerraNeo app has fixed mesh width in radial direction, i.e. between the layers. See !732 (comment 30156).
HyTeG has been providing a variant of MeshInfo::meshSphericalShell
that allows to specify arbitrary radii for the individual layes for a long time already. We need to ensure that the TerraNeo app does not restrict this flexibility.
I will add this issue to the to-do list in #243.