Play/Pause icon change

[Kycau]

It would be helpful if "play"-button (triangle) would change to "pause"-button (double vertical line), when playback is put on pause.

[OndrejPetrzilka]

It's probably not that simple, since it's not possible to know in which state the playback is.
Also there might be multiple different "playbacks" at single moment.

The app just sends "Play/Pause" media key to the system.