[6.7 REG] Changing QML Window visible property clobbers window state

Beginning in Qt 6.7.0, setting 'Window.visible = false' on a visible window unexpectedly clobbers the existing window state (and position, in some cases).

Repro steps:

1. Run the included Qt Quick project
2. Maximize the window
3. Click the button to hide the window for 2 seconds

Bonus repro steps (multi-monitor scenario):

1. Run the included Qt Quick project
2. Move the window to another monitor
3. Maximize the window
4. Click the button to hide the window for 2 seconds

Expected Behavior:

After 2 seconds, the window should reappear at the location and state (minimized/maximized/fullscreen/normal) it was prior to being hidden. This is the behavior of the included project when running on Qt 6.6.3 or earlier.

Actual Behavior:

On Qt 6.7.0, the window reappears in a non-maximized state and sometimes in a different location if the window was moved. For the multi-monitor scenario, the window may appear on a completely different screen than it was when hidden, though this doesn't seem to happen consistently.