Add websocket event stream for sim updates.

As a proof of concept this only covers the flight positions.

qt_ui/widgets/map/model/flightjs.py

@@ -17,6 +17,7 @@ from .waypointjs import WaypointJs
 
 
 class FlightJs(QObject):
+    idChanged = Signal()
     positionChanged = Signal()
     flightPlanChanged = Signal()
     blueChanged = Signal()
@@ -50,6 +51,10 @@ class FlightJs(QObject):
         self.ato_model = ato_model
         self._waypoints = self.make_waypoints()
 
+    @Property(str, notify=idChanged)
+    def id(self) -> str:
+        return str(self.flight.id)
+
     def update_waypoints(self) -> None:
         for waypoint in self._waypoints:
             waypoint.timingChanged.emit()