Improve presentation of very small and very large Parameters/DescriptorNumbers

[henrikjacobsenfys]

We should add a simple check: if a Parameter/DescriptorNumber is larger than e.g. 1e5, or smaller than 1e-3, we represent it as x.xxxx*10^yy - otherwise it becomes hard to read:

We can consider smarter solutions that also check the variance, so instead of e.g. 10.0000 +-1.0000, we write 10.0 +-1.0.

This is not a high priority at all.