Environment

Vuetify Version: 2.3.10
Vue Version: 2.6.12
Browsers: Chrome 84.0.4147.135
OS: Windows 10

Steps to reproduce

Add a VProgressCircular to your project, change theme to dark.

Expected Behavior

In light theme, both loaded part and unloaded part are visible - have different color from each other and from background color.
Expected the same in dark

Affected documentation page: https://material.angular.io/components/stepper

1. Examples using MatStepperIntl. There's a small mention to it in the overview page, but it'd be better if you put a real example on it. Basically the same request as #8239 (for paginator).
2. StepState is not being shown up in API page. To know what stepState @Input expects we should go deep in code.
3. Ex

Is there any way to implement horizontal radio button group?

Currently the color zone supports setting Primary* values in its Mode property. Currently it only supports a single Accent value. We should add two additional values to ColorZoneMode called AccentLight and AccentDark.

The triggers that set the Background/Foreground for each of the modes are set in the [Generic.xaml](https://github.com/MaterialDesignInXAML/MaterialDesignInXamlToolkit/blo