rem: KDGanttViewTaskItem( parent ), mAttendee( attendee )
add: KDGanttViewTaskItem( parent ), mAttendee( attendee ), mTimerID( 0 ), mIsDownloading( false )
context:     FreeBusyItem( Attendee *attendee, KDGanttView *parent ) :      KDGanttViewTaskItem( parent ), mAttendee( attendee )    {      Q_ASSERT( attendee );      updateItem();      setFreeBusyPeriods( 0 );      setDisplaySubitemsAsGroup( true );      if ( listView () )          listView ()->setRootIsDecorated( false );    }