Audio seek does not work on first playback

[trevorvanhoof]

If we:

• mute the application
• scrub to a point in time
• unmute
• press play
  Qt multimedia will load the song and we will tell it to go to a certain positoin and play
  But because of reasons Qt loads the song async and we can't set the position as soon as the song exists
  If we pause and press play again it WILL set the position correctly because the second call DOES get honored by Qt

The robust thing to do is probably:

• Check if song is seekable directly after load
• If not: start a looping timer that will check again after N milliseconds
• If seekable: stop the timer and set position to current time (Song needs to know about Timer for this)