Added sidebar support for group instances.
Also group now properly inherits from the presence view.
Patch by: Lennard de Rijk
Reviewed by: to-be-reviewed
.mcePageBreak {display:block;border:0;width:100%;height:12px;border-top:1px dotted #ccc;margin-top:15px;background:#fff url(../img/pagebreak.gif) no-repeat center top;}