[6.8.4][Examples&Demos] QML Video Example window color looks disabled and button text misaligned

QML Video Example window color looks disabled (faded white color) when opened on macOS with dark theme. Also the button text is misaligned (top alignment instead of center alignment).

Steps to Reproduce:

1.  Set the theme of your macOS to dark from Settings -> Appearance
2. Open Qt Creator and select "QML Video" Example
3. Build it using "Qt 6.8.4 for macOS" kit and run it

Observation: Window color issue is due to the use palette.dark reported here: QTBUG-138151

Actual Output:

Example runs with UI issues such as: white faded window color and misaligned buttons.

Expected Output:

Example should run without any UI issue.

Reproducibility: 100%

Note: 

I will attach one screenshot of qt 6.8.4 example and one screenshot of qt 6.5.9 example to show the difference.