HyperlinkButton underline logic doesn't match WinUI #17262
Description
Current behavior
Currently, we always underline if the ContentPresenter child is ImplicitTextBlock.
On WinUI, there is one extra condition needed. It's one of the two:
- Having HighContrast theme
- Having HyperlinkUnderlineVisible set to true (it defaults to false)
Expected behavior
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How to reproduce it (as minimally and precisely as possible)
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Workaround
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Works on UWP/WinUI
None
Environment
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NuGet package version(s)
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Affected platforms
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IDE
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IDE version
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Relevant plugins
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Anything else we need to know?
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