• The issue is present in the latest release.
• I have searched the [issues](https://github.com/mui-o

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>

Not a single form field has a label. These designs are not usable and the patterns presented should be discouraged.

I suggest adding a validation check like Nu Validator, aXe, lighthouse, etc. to show all the places this markup is invalid.

Is there any way to implement horizontal radio button group?

Is your feature request related to a problem? Please describe.
When setting the layout anchor of a extended fab to the bottom app bar it does not show the cutout.

Describe the solution you'd like
The ability to use any shape as the cutout, or at least all the Fab variants.

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