cross ref item : show the master comment at the bottom of cross

element : improve the function to sort an element list
qet graphics item : add a bool to disable the snap to grid (used for cross ref item, to be exactly at the bottom of element)


git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@2948 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/qetgraphicsitem/qetgraphicsitem.h

@@ -51,6 +51,7 @@ class QetGraphicsItem : public QGraphicsObject {
 	protected:
 	bool is_movable_;
 	bool first_move_;
+	bool snap_to_grid_;
 	QPointF mouse_to_origin_movement_;
 
 };