Added FlowDirection override to default ColorSpectrum style

[Avid29]

Fixes

#10798

PR Type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

Description

Overrides the FlowDirection of the ColorSpectrum to be LeftToRight regardless of parent FlowDireciton

Current Behavior

ColorSpectrum.FlowDirection will be inherited from its parent, resulting in a mirrored view when RightToLeft

New Behavior

Unless explicitly set to FlowDirection.RightToLeft, the ColorSpectrum will remain LeftToRight and the color spectrum will not be mirrored.

Motivation and Context

Fixes #10798

How Has This Been Tested?

• I have performed a self-review of my own code
• I have added tests to cover my changes

I have not tested the code with this change. I'd appreciate help setting up a test environment. This is a very simple change though.

Screenshots (if appropriate):