Measure Gizmo - Release m_measuring content when leaving the gizmo

src/slic3r/GUI/Gizmos/GLGizmoMeasure.cpp

@@ -405,6 +405,9 @@ void GLGizmoMeasure::on_set_state()
         restore_scene_raycasters_state();
         m_editing_distance = false;
         m_is_editing_distance_first_frame = true;
+        m_measuring.reset();
+
+        int a = 0;
     }
     else {
         m_mode = EMode::BasicSelection;