2.6.2

1. Fix browser tab/title not showing song details.
2. Call icon mapping code for items in 'My Music' and favourites.
3. Fix downloading a 'Various Artists' album from 'New Music'.
4. Move 'Abort all' downloads button into toolbar.
5. When downloading, if track has no album artist then see if we can use the value from the current browse history. If this still fails and the track is marked as part of a a compilation then use LMS's 'Various Artists' string.
6. Add support for sending notifications from perl to webapp.