Bug: Dark ←→ Light Mode transition graphical glitches

[orchetect]

There is a specific issue that presents itself when the system in is Dark Mode when an application that uses MacControlCenterUI is run.

When the app is run, the controls initially look correct regardless of Light/Dark Mode.

1. Set system to Dark Mode
2. Launch the demo app in this package
3. Set the system to Light Mode
4. The slider becomes white which renders it invisible against the white background of the slider itself
5. Set system back to Dark Mode
6. The image reverts back to the correct dark-gray color it initially started with when the app launched in Dark Mode

All other controls are unaffected.

[orchetect]

Also the slider background does not update when changing between Dark and Light mode.