[Pidgin] #4398: Fix showing user tunes in roster

[Pidgin]

#4398: Fix showing user tunes in roster
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Reporter:  js     |       Owner:  nwalp
    Type:  patch  |      Status:  new  
Priority:  minor  |   Component:  XMPP 
 Version:  2.3.1  |    Keywords:       
 Pending:  0      |  
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 The tooltip only showed the title of the currently played tune. This patch
 fixes it and also shows the author and the album.

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Ticket URL: <http://developer.pidgin.im/ticket/4398>
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