Fix Decoration positions on Views derived from DPG Base

- Section faces, detail highlights, center and section lines
  were wrong when the BaseView was a DPGI

src/Mod/TechDraw/App/GeometryObject.h

@@ -66,6 +66,8 @@ TopoDS_Shape TechDrawExport moveShape(const TopoDS_Shape &input,
 //! Returns the centroid of shape, as viewed according to direction
 gp_Pnt TechDrawExport findCentroid(const TopoDS_Shape &shape,
                         const Base::Vector3d &direction);
+gp_Pnt TechDrawExport findCentroid(const TopoDS_Shape &shape,
+                                      const gp_Ax2 viewAxis);
 Base::Vector3d TechDrawExport findCentroidVec(const TopoDS_Shape &shape,
                         const Base::Vector3d &direction);