Shuffle button makes UI not reflect currently playing song

[CodeF0x]

When no song is loaded / playing (e. g. after playlist end or after a directory got loaded) and you click the shuffle button, I would expect the music to start playing. Also, clicking the play button does nothing. When you then click on any song, it's a matter of luck if the correct song is highlighted as currently playing. Also, when you skip songs, the wrong songs are highlighted