Fixed T+ not updating in the list of flight shown in the mission planner.

qt_ui/windows/mission/QMissionPlanning.py

@@ -98,6 +98,7 @@ class QMissionPlanning(QDialog):
         self.planned_flight_view.repaint()
 
         if self.flight_planner is not None:
+            self.flight_planner.on_planned_flight_changed.disconnect()
             self.flight_planner.clearTabs()
 
         try:

qt_ui/windows/mission/QPlannedFlightsView.py

@@ -23,6 +23,7 @@ class QPlannedFlightsView(QListView):
             self.flightitems[i].update(f)
 
     def setup_content(self, row=0):
+        self.flightitems = []
         for i, f in enumerate(self.flight_planner.flights):
             item = QFlightItem(f)
             self.model.appendRow(item)