[chronojump] ForceSensor: Ensure button_execute_test is not active after adjust if there are no persons

[Xavier de Blas <xaviblas src gnome org>]

commit ea56a3e0a254e1e78e24d0653a7b2d4af93a12f9
Author: Xavier de Blas <xaviblas gmail com>
Date:   Mon May 3 16:40:54 2021 +0200

    ForceSensor: Ensure button_execute_test is not active after adjust if there are no persons

 src/gui/app1/forceSensor.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/gui/app1/forceSensor.cs b/src/gui/app1/forceSensor.cs
index f3adfaea..bb4ef118 100644
--- a/src/gui/app1/forceSensor.cs
+++ b/src/gui/app1/forceSensor.cs
@@ -2707,7 +2707,7 @@ LogB.Information(" fs R ");
 
                button_activate_chronopics.Sensitive = s;
                image_test.Sensitive = s;
-               button_execute_test.Sensitive = s;
+               button_execute_test.Sensitive = (s && currentPerson != null && currentPerson.UniqueID > 0 && 
currentSession != null);
                button_force_sensor_image_save_signal.Sensitive = s;
 
                viewport_persons.Sensitive = s;