EXTRAS-243 - Add a band selection option to threshold selection

[tclarke]

OPTICKS-277 introduced a new threshold option to the Simple API which allows selection of a band number for display in a threshold layer. This issue adds the Python side of the implementation.

Original Issue: EXTRAS-243
Status: Deferred
Feature Interpretation:

Suggested Solution:

Actual Solution:

Severity:
Version Control:
Environment:
Linked: