Rework sim status update to not need a thread.

Rather than polling at 60Hz (which may be faster than the tick rate,
wasting cycles; and also makes synchronization annoying), collect events
during the tick and emit them after (rate limited, pooling events until
it is time for another event to send).

This can be improved by paying attention to the aircraft update list,
which would allow us to avoid updating aircraft that don't have a status
change. To do that we need to be able to quickly lookup a FlightJs
matching a Flight through, and Flight isn't hashable.

We should also be removing dead events and de-duplicating. Currently
each flight has an update for every tick, but only the latest one
matters. Combat update events also don't matter if the same combat is
new in the update.

https://github.com/dcs-liberation/dcs_liberation/issues/1680

qt_ui/widgets/QConditionsWidget.py

@@ -12,6 +12,7 @@ from PySide2.QtWidgets import (
 from dcs.weather import CloudPreset, Weather as PydcsWeather
 
 import qt_ui.uiconstants as CONST
+from game.sim.gameupdateevents import GameUpdateEvents
 from game.utils import mps
 from game.weather import Conditions, TimeOfDay
 from qt_ui.simcontroller import SimController
@@ -55,7 +56,7 @@ class QTimeTurnWidget(QGroupBox):
 
         sim_controller.sim_update.connect(self.on_sim_update)
 
-    def on_sim_update(self) -> None:
+    def on_sim_update(self, _events: GameUpdateEvents) -> None:
         time = self.sim_controller.current_time_in_sim
         if time is None:
             self.date_display.setText("")