Graphic Artifacts when using GroupBox/Card in ViewBox

还没有人认领这个 Issue。

I have a UserControl with a ViewBox inside.
I don't know why but in dark mode, some graphic artifacts appear when I move my mouse over them

https://user-images.githubusercontent.com/54487782/116099068-e36b2380-a6ab-11eb-9093-8e60a94b9d62.mp4

I've tried to fix it with the different solutions listed here : https://github.com/MaterialDesignInXAML/MaterialDesignInXamlToolkit/issues/1097
I've tried :
- `UseLayoutRounding="True"`
- `SnapsToDevicePixels="True"`
- `RenderOptions.ProcessRenderMode = System.Windows.Interop.RenderMode.SoftwareOnly`

Moreover, I've tried to visualize my ViewBox with Snoop, but Height and Width values seem normal.

In light mode I don't have this problem.

**- EDIT -**
I lowered the brightness of my screen, and I just saw that there are also artifacts in light mode.

首先，使用包含 ViewBox 和 GroupBox/Card 的 UserControl 重现报告中的伪影，并比较深色和浅色模式以及附带的视频。检查已尝试的 UseLayoutRounding、SnapsToDevicePixels 和软件渲染设置；当移动鼠标或降低屏幕亮度时不再出现这些伪影，即表示完成。

由索引模型根据 Issue 内容生成。