Histogram Scale Update

No need to arbitrarily scale y-axis to min range = 1.0
Revert "Histogram Scale Update"

This reverts commit 2342a57a2b1c8b5edb3d0daf14301d8017eaf74f.
Histogram-Update Y-scale Min

Histogram y-scale can’t go less than 1.0 currently.  Updating to remove
this scale and let if float appropriately.
Merge pull request #1210 from beltashazzer/histogram_update

Histogram update