Upgrade normalization options for rose module

[maxrjones]

1. Let -N with no argument be a backwards compatible way to select sqrt(normalized-radii). This would be marked as a deprecated option.
2. As an alternative to -N, introduce -S[+a] for what presently requires -S -N, with +a meaning "area normalization"
3. Introduce -N0[+ppen] for drawing the best-fitting Least-squares von Mises pdf fit on top of the polar histogram (there are no robust fits yet for these distros, but if we add those later then best to have the same -N0|1|2 syntax as in histogram).

Originally posted by @PaulWessel in #5056 (comment)