Mac: Added UI for StartResumePlayback.

- Mac: Added UI for StartResumePlayback. Screen works as intended, but
still needs a little layout adjustment.
- Fixed bug in StartResumePlaybackPresenter where the string comparison
would fail when the string was null in RefreshDevice().
- Fixed bug in NavigationManager where the resume playback info would
not be sent to the constructor of IStartResumePlaybackView.