Do not copy UWP behavior with ListBoxItem horizontal alignment #7183
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What is the current behavior?
In Default theme default ListBoxItem horizontal alignment is Stretch. Same as in WPF.
In Fluent theme we copy UWP behavior and set Left value instead. Note, newer WinUI versions use Stretch as well.
Why is it a problem?
https://stackoverflow.com/questions/43094395/how-to-stretch-listviewitem-in-listview
microsoft/microsoft-ui-xaml#1402
What is the updated/expected behavior with this PR?
Do not override default value in theme. Which makes it "Stretch" value (HorizontalAlignment enum default value).
Breaking changes
Technically it is a styling breaking change.