Refs #7789. Added single peak offset as a criteria.

If an individual peak's offset on position exceeds the maximum offset,
then it will be deleted from the peaks for calculating offset.
Refs #7789.  Refine auto peak fit range.

Rename a parameter.
Added Zscore on each peak's offset. Refs #7789.
Merge branch 'feature/7789_fitpeak_to_findpeaks_new' into develop