Fix album shuffle issue

Hi,

This pull request addresses issue #4402 where after restarting Clementine in shuffle album mode, the current album was skipped after playing one track.

The change tests if a track is selected (despite being paused or stopped) and the user simply hits play, it will prioritize that music's album and won't skip the album after playing one track. The difference is that it doesn't only check if the track is **currently** playing, but as in account if it also selected.

Thanks!
Waiting feedback.
"but it was selected" I believe this happen only when we just started Clementine no? Or did I miss other cases?
If so, maybe better to indicate this in the comment to make things clearer.
Otherwise, I tested your change and if fixes the issue indeed, thanks :)