remember playlists scroll position

[GoogleCodeExporter]

Handling multiple huge playlist would be much easier if they would remember 
their individual scroll positions while switching among them.

Use case:
- huge source playlist, let's say hundreds of songs
- user is browsing the playlist, eventually wants to copy some of the songs to 
the target playlist (via copy/paste plugin)
- user has to select appropriate songs, copy them, switch to target playlist, 
paste them, and switch back to source playlist to continue browsing
- bam, scroll position is lost, it always reverts to active (playing) song 
position, but user would like to continue browsing the playlist from last 
position

Alernative solution: implement "copy to XYZ playlist" action as Clementine 
does, so it's possible to copy without actually switching to target playlist.

Original issue reported on code.google.com by morov...@live.com on 5 Nov 2014 at 5:26

[GoogleCodeExporter]

Maybe scrolling to selected tracks instead of active one on playlist switching 
would do the trick and may be easier to implement.

Original comment by morov...@live.com on 7 Nov 2014 at 2:36

[GoogleCodeExporter]

Original comment by trialuser02 on 8 Nov 2014 at 2:20

• Changed state: Accepted

[GoogleCodeExporter]

This issue was closed by revision r4687.

Original comment by trialuser02 on 9 Jan 2015 at 6:28

• Changed state: Fixed