Prevent width-constrained maximised windows from overlapping the Windows taskbar

On Windows, maximising an Objo Window that has a MaximumWidth constraint can place the bottom of the window behind the taskbar. The native title bar may also be wider than the constrained window. The window is maximised rather than fullscreen, so it should remain inside the desktop work area while honouring its size constraints.

This is inherited from an upstream Avalonia Windows bug: https://github.com/AvaloniaUI/Avalonia/issues/14167