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## Fixes #
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<!-- Add a brief overview here of the feature/bug & fix. -->
Adding a new visual state trigger which can be triggered based on a the width of a UI element rather than the width of the app's entire window.

## PR Type
What kind of change does this PR introduce?
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<!-- - Bugfix -->
 Feature 
<!-- - Code style update (formatting) -->
<!-- - Refactoring (no functional changes, no api changes) -->
<!-- - Build or CI related changes -->
<!-- - Documentation content changes -->
<!-- - Sample app changes -->
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## What is the current behavior?
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## What is the new behavior?
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## PR Checklist

Please check if your PR fulfills the following requirements:

- [x] Tested code with current [supported SDKs](../readme.md#supported)
- [x] Pull Request has been submitted to the documentation repository [instructions](..\contributing.md#docs). Link: https://github.com/MicrosoftDocs/WindowsCommunityToolkitDocs/pull/551<!-- docs PR link -->
- [x] Sample in sample app has been added / updated (for bug fixes / features)
    - [x] Icon has been created (if new sample) following the [Thumbnail Style Guide and templates](https://github.com/windows-toolkit/WindowsCommunityToolkit-design-assets)
- [x] New major technical changes in the toolkit have or will be added to the [Wiki](https://github.com/windows-toolkit/WindowsCommunityToolkit/wiki) e.g. build changes, source generators, testing infrastructure, sample creation changes, etc...
- [x] Tests for the changes have been added (for bug fixes / features) (if applicable)
- [x] Header has been added to all new source files (run *build/UpdateHeaders.bat*)
- [x] Contains **NO** breaking changes

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## Other information