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

In the example of nested Tree ,for the node without children there should't be matTreeNodeToggle tag , it is like this :

<mat-tree-node *matTreeNodeDef="let node" matTreeNodeToggle>

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