Allow user to pass in pre-defined classes to histogram function

[DanielJDufour]

Is your feature request related to a problem? Please describe.

User already has their bins

Describe the solution you'd like

Not sure. I think we need to rethink organization. Perhaps have three buttons under 1. Select a measurement scale that say:
Ratio, Nominal, Custom or Ratio, Nominal, Pre-Defined

A user then selects which one they want and the following options to select how many classes and type of distribution are hidden or shown based on the selection in 1.

Describe alternatives you've considered

Not sure

Additional context

This comes from a user request

[DanielJDufour]

GeoBlaze needs to be updated to accept pre-defined classes: https://github.com/GeoTIFF/geoblaze/blob/master/src/histogram/histogram.module.js#L91