Port the configuration interface to WPF or WinUI

I've recently noticed Windows Forms are horrible at scaling to HiDPI displays. It would be better to use another UI Toolkit, such as WPF or WinUI, which tend to scale much better, as well as offer more services for integration with Windows 10 and 11.

For example on how this should look, see the Microsoft PowerToys and ModernFlyouts configuration utilities.