Check mark of checked MenuItem on ToolBar is not visible

* .NET Core Version: 3.1.302
* Windows version: 19041.388
* Does the bug reproduce also in WPF for .NET Framework 4.8?: Yes
* Is this bug related specifically to tooling in Visual Studio (e.g. XAML Designer, Code editing, etc...)? If yes, please file the issue via the instructions [here](https://docs.microsoft.com/visualstudio/ide/how-to-report-a-problem-with-visual-studio?view=vs-2019). : No
* Security issues and bugs should be reported privately, learn more via our [responsible disclosure guidelines](https://github.com/dotnet/wpf/blob/master/README.md#reporting-security-issues-and-security-bugs).

**Problem description:**
Checkbox bakcground color of Checked MenuItem placed on ToolBar is black.

Aero2 Theme (Windows10 Default Theme / PresentationFramework.Aero2)

Aero Theme (PresentationFramework.Aero)

**Actual behavior:**
Checkbox is filled with black and the check mark is not visible

**Expected behavior:**
Specify an appropriate color to `ToolBarMenuCheckFill`.

https://github.com/dotnet/wpf/blob/8920b2d117e115edbb793fbe8bde28c8a36e3b2d/src/Microsoft.DotNet.Wpf/src/Themes/XAML/ToolBar.xaml#L280

**Minimal repro:**
```xaml

```