Dark theme styling (custom UI) for the main window title bar

[LarsKemmann]

I don't know if there are any constraints on this with the panel UI system that you're using. It doesn't seem like there should be, since that system doesn't force system-decoration title bars for its floating panels.

Some references that might help:

• https://stackoverflow.com/questions/65333019/easier-way-in-net-avalonia-to-change-the-background-color-of-the-windows-syste
• customizable title bar AvaloniaUI/Avalonia#12090

[countincognito]

I think I might leave this one. It works fine in Windows 11.

[LarsKemmann]

Agreed, works well in Win11.