Clear playlist_search_entry_box: lose highlighted track

[etnlIcarus]

When a track is playing and you clear the playlist search entry box, the playlist returns focus to the currently playing track, rather than any track highlighted while the playlist was filtered.

If no track is playing, clearing the search entry box merely returns you to the top of the playlist and any highlighted track is lost.

[Mathias Brodala (mathbr)]

This seems to have been fixed already since the issue described does not occur: the selection during filtering will stay intact after clearing the search box.