Normalization by average_beta / local_beta
Proposal to fix the issue raised by @alphaover2pi over email.
Warning, this fix contains changes which will change the default behavior of core functions:
- Default behavior of Optics is changed when AT lattice is loaded: now default to optic function to s=0 instead of average ones.
- Default behavior of LongRangeResistiveWall and ImpedanceModel when an AT lattice is loaded is to normalized by average_beta / local_beta
To be discussed ...