* Fix bug #0022843: EDF GEOM: [HYDRO] Polyline using a former polyline. Changed algorithm of polyline and spline construction.
* Fix bug # 0022846: EDF GEOM: [HYDRO] Creation of a polyline : add intermediate points and remove points. Added opportunity to add/remove/modify a new or an intermediate points, select their and modify. Also implemented opportunity to drag and drop points. Set violet color for AIS_InteractiveObject in temporary Z layer. Changed behavior of selected object's import.