11.1.0 - Window position is incorrect when the SystemDecorations property is set to BorderOnly

[pavelovcharov]

Describe the bug

When you set the SystemDecorations property to BorderOnly, the window doesn't appear at the specified position, but with an offset

The window is shown correctly in version 11.0.11

To Reproduce

Clone the sample repository, build the solution and run it.

Expected behavior

Window should appear at the specified position

Avalonia version

11.1.0

OS

Windows

Additional context

In version 11.0.11, the actual position of the window also depends on the order in which the Position and SystemDecorations properties are set