[chronojump] Force sensor: better last tare/calibration message

[Xavier de Blas <xaviblas src gnome org>]

commit 21094ac9bafa3aedef85de8745a8ddc618e777ed
Author: Xavier de Blas <xaviblas gmail com>
Date:   Fri Jun 7 16:53:19 2019 +0200

    Force sensor: better last tare/calibration message

 src/preferences.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/preferences.cs b/src/preferences.cs
index 7f3e87c0..089b7838 100644
--- a/src/preferences.cs
+++ b/src/preferences.cs
@@ -297,7 +297,8 @@ public class Preferences
                        "\n\nLast Calibrate:" +
                        "\n\t- internal value: " + forceSensorCalibrationFactor.ToString() +
                        "\n\t- with: " + forceSensorCalibrationWeight.ToString() +
-                       " Kg\n\t- at: " + forceSensorCalibrationDateTime;
+                       " Kg\n\t- at: " + forceSensorCalibrationDateTime +
+                       "\n\nNote this information is related only to the tares and calibrations of any force 
sensor on this machine.";
        }
 
        public char CSVColumnDelimiter