Play button, media description go to default state when application is restarted.

[daxcurson]

I don't know why, but the status of the Play button is not restored correctly when the application is restored. I thought I fixed this?

[daxcurson]

Also, the media information goes blank. How to reproduce: open the application, start to play, then press home; also, the playlist goes blank. These elements appear not to be saved in the View Model and restored when the application is started.