[DarkMode] Anchor attribute selection is unclear in Dark Mode

[Amy-Li03]

.NET version

.NET SDK 11.0.100-preview.1.26071.101

Did it work in .NET Framework?

Yes

Did it work in any of the earlier releases of .NET Core or .NET 5+?

The issue also reproduced on .NET 9.0

Issue description

In Dark Mode, we cannot distinguish which value of the Anchor attribute has been selected. It's hard to tell the difference between selected and unselected states.

Dark Mode:

Classic Mode:

Steps to reproduce

1. Create a new Windows Forms .NET application
2. Add a PropertyGrid control to the form designer
3. Set the selectedObject property of propertyGrid1 as Form1
4. Set app under Dark mode in program.cs file:
   Application.SetColorMode(SystemColorMode.Dark);
5. Run the application
6. Open the Anchor property and select the dropdown value