new function : hide all the particles when click left mouse on the distribution image with originalbackground.

OTSIncAReportApp/1-UI/Control_Graph/Controls/Control_DrawDistrbutionImageAndBSE.cs

@@ -907,7 +907,11 @@ namespace OTSIncAReportGraph.Controls
                             
                             }
                             item.DraggingPoint = e.Location;
-
+                            if (OriginalBackground)
+                            {
+                                dp.SetPaintState(PaintState.NOPAINT);
+                            }                         
+                            
 
                         }
                         foreach (DisplayField item in m_list_allDfield)