rem: KMHeaderItem( QListViewItem* parent, KMFolder* folder, int msgId,
add: KMHeaderItem( QListView* parent, KMFolder* folder, int msgId,
context:   KMHeaderItem( QListViewItem* parent, KMFolder* folder, int msgId, 		KMPaintInfo *aPaintInfo )    : QListViewItem( parent ),       mFolder( folder ),      mMsgId( msgId ),      mPaintInfo( aPaintInfo )  {    irefresh();  }