Fixes #701 Apply documentation patch for: Party Mode
Fixes #572651
LP: #329389
Downstream BugTracker: https://bugs.launchpad.net/ubuntu/+source/rhythmbox/+bug/329389
Gnome BugTracker: https://bugzilla.gnome.org/show_bug.cgi?id=572651
Patch Source: #701 (comment 209815)