Fix: Color > HighContrast theme toggle highlight

[Zakariathr22]

Description

The changes in this PR prevent the SampleThemeListener from applying theme changes to all child elements, including some textboxes, which do not need to be affected by the theme toggle. These changes address the issue of inconsistent text highlighting in the "High Contrast" section of the ColorPage by improving theme handling. The main changes are:

• Removed <SampleThemeListener> from ColorPage.
• Added <SampleThemeListener> to other "Color Sections" pages as needed for better modularity.

Motivation and Context

Fixes #1671

How Has This Been Tested?

Manually Tested by toggling the theme in all sections of the ColorPage and observing the behavior.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

[niels9001]

Tested, works great. Thanks!!

[Jay-o-Way]

@niels9001 still wondering why this theme listener doesn't seem to play nice when built into the example control. Do you know why? My first guess would be different namespaces, but not sure.
#1675 (comment)

[niels9001]

/azp run

[AdhamCl]

Thanks!!