Window ExtendClientArea Broken in 11.1-beta2

[robloo]

Describe the bug

It seems both ExtendClientAreaChromeHints and ExtendClientAreaToDecorationsHint have been broken in 11.1 beta2.

1. The app is not extending into the titlebar at first window load. It does however fix itself when the app is resized
2. The system window buttons (minimize, maximize, close) never appear (duplicate of Window can't be dragged using title bar and no caption buttons rendered with extend client area #15522)

To Reproduce

<Window
    ExtendClientAreaChromeHints="PreferSystemChrome"
    ExtendClientAreaToDecorationsHint="True">

Expected behavior

Avalonia version

11.1-beta2

OS

Windows

Additional context

There are recent PRs in this area. One of them broke this functionality.

Otherwise, on my end this code has worked fine since 11.0 previews and is unchanged since.

[jp2masa]

Duplicate of #15522?

[robloo]

#15522 is a duplicate of point number 2 above (no caption buttons). However, the first one appears to be different.

[TomEdwardsEnscape]

#14470 is an obvious candidate, but it was included in beta1. Was everything OK in that version?

[robloo]

#14470 is an obvious candidate, but it was included in beta1. Was everything OK in that version?

@TomEdwardsEnscape Yes, 11.1-beta1 doesn't have these issues.

[robloo]

Also note that extend into client area does work again if the Window is resized. So another PR just broke the startup path that was applying this property on first load.

(The caption buttons are still broken reguardless)