VidExies Mac UI doesn't handle stop button in ReplayKit recording.

Using ReplayKit on macOS puts a recording stop button on the menu bar.

If you hit that, recording stops but it's not integrated with our UI, failing to change from the fullscreen display.

If you then tap to stop, our `ReplayKitRecorder.stopRecording` completion handler gets the error:

_Error stopping recording: Failed due to attempting to stop a recording that wasn’t in recording state_