Protect current playlist from accidently playing new song

[GoogleCodeExporter]

Which plugin is the bug/enhancement related to ?
Custom Browse

What version of SlimServer/SqueezeCenter are you using? 
7.7.2
On what operating system?
Linux (QNAP)

Could you describe the problem or enhancment ?
Not sure if this is fundamental to SB or something Custom Browse can improve 
on. 
If you have spent a long time building up a currently playing playlist and you 
accidently press the play button/menu option don't simply destroy the current 
play list and start a new one.
Either a are you sure menu or add to playlist default action would do for me.

I have so much trouble explaining/reminding my GF/friends not to select "Play" 
when adding a song to the playlist.

What steps will reproduce the problem?
1. Have a playlist running
2. Find a song and select "Play"
3. The old playlist is forgotten without warning and a new playlist is created.

Original issue reported on code.google.com by stewart....@googlemail.com on 11 Sep 2012 at 2:14