[chronojump] On changeMode, cleared event_execute_label_message. Nice between forceSensor and raceAnalyzer

[Xavier de Blas <xaviblas src gnome org>]

commit 61ebb3b08c77d6d9e923d5ebe02a32ff5cc202c8
Author: Xavier de Blas <xaviblas gmail com>
Date:   Mon Aug 16 17:56:17 2021 +0200

    On changeMode, cleared event_execute_label_message. Nice between forceSensor and raceAnalyzer

 src/gui/app1/chronojump.cs | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/gui/app1/chronojump.cs b/src/gui/app1/chronojump.cs
index b60d06f20..7c51defbd 100644
--- a/src/gui/app1/chronojump.cs
+++ b/src/gui/app1/chronojump.cs
@@ -3476,6 +3476,8 @@ public partial class ChronoJumpWindow
 
                hbox_combo_select_contacts_top_with_arrows.Visible = false; //TODO: this will be unneded
 
+               event_execute_label_message.Text = "";
+
                //blank exercise options: useful for changing from jumps or runs to forceSensor, runEncoder, 
reaction time, other
                label_contacts_exercise_selected_name.Visible = true; //will not be visible when all the 
contacts_top combo is implemented
                label_contacts_exercise_selected_options.Text = "";