Bugs in Sandmath44 Rev 7

[fcrvincent]

I found the following bugs in the latest version (June 2025) of Sandmath44 rev 7:

* in the -PB/STS menu :
+ invoking respectively the MEAN and SDEV keys return the values of the standard deviation and the mean instead of the other way around. When I invoke the MEAN SDEV functions directly with XEQ the functions behave as expected; the issue is only when invoked from the Stats/Probs launcher menu.
+ In the second MN (shifted) menu: 0: 1 : N : D : P : W : X : Σ , the following options seem to be assigned to incorrect functions:
0 -> displays EECC, instead of CIRCL
P -> displays CEIL, instead of PL
W -> displays PMEAN, instead of PTWIN
X -> display MTXP instead of PNEXT

* The PTWIN function (looking for the next two prime numbers after X such that P2=P1+2) freezes the HP41CX, that then needs to be reset.
* I also noticed that invoking the HMEAN (Harmonic Mean) function from the -ST/PBS menu returned the same value as the GMEAN (Geometric Mean) and that the AMEAN and PMEAN functions return incorrect values.

The whole -PB/STS menu/launcher seems to have function calls issues. Hopefully ÁM will be able to solve this and make his otherwise amazing SandMath package behave as it should.

I did email Ángel Martin and hope that he'll be able to fix this.