Update calib_dlg

1.Add a dlg for flowrate-fine.
2.Add the notice when using the calibration feature.
3.Optimized parameter settings.

src/libslic3r/calib.hpp

@@ -15,7 +15,8 @@ enum class CalibMode : int {
     Calib_Temp_Tower,
     Calib_Vol_speed_Tower,
     Calib_VFA_Tower,
-    Calib_Retraction_tower
+    Calib_Retraction_tower,
+    Calib_FRF
 };
 
 struct Calib_Params {