Track colors not showing as expected.

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I have an empty app running the swiftui-sliders examples and have noticed that I am unable to modify the track background colours on any slider without losing the track foreground colour. I'm on Swift 5.4 using XCode 12.4

Also... changing the app's accentColor works to change the track foreground color of Swift's default slider (included at the top of your horizontal slider examples) but has no impact on the swiftui-sliders themselves. I don't know if this is expected behaviour.