hide results window after doing statistics

src/main/java/mpicbg_scicomp/imgTools/gui/SurfaceManager.java

@@ -1932,6 +1932,7 @@ public class SurfaceManager extends JFrame implements ImageListener {
 		}
 
 		rt.show("Average gray value Slice by Slice");
+		WindowManager.getWindow("Results").hide();
 
 		return rt;
 	}