The commit in the pull request:
- Extends NSScreen with a new optional computed property,
    cameraHousingHeight
- Adds a new class CameraAreaMaskWindow that is used to black out the
    area of the screen to the left and right of the camera housing
- Changes MainWindowController.legacyAnimateToFullscreen to check if
    cameraHousingHeight indicates a camera housing intrudes into the
    screen and if so reduce the size of the full screen video window
    appropriately and put up a black window to hide the wallpaper on
    either side of the camera housing
- Changes MainWindowController.legacyAnimateToWindowed to close the
    window masking the area around the camera housing if displayed
- Adds NSPrefersDisplaySafeAreaCompatibilityMode set to false to
    Info.plist