Add support for some extra loadout types.

Also fixes the bug that @Starfire13 spotted in Khopa/dcs_liberation#744.

qt_ui/windows/mission/flight/payload/QPylonEditor.py

@@ -46,6 +46,7 @@ class QPylonEditor(QComboBox):
     def default_loadout(self, pylon: Pylon) -> None:
         self.flight.unit_type.load_payloads()
         pylon_default_weapon = None
+        loadout = None
         # Iterate through each possible payload type for a given aircraft.
         # Some aircraft have custom loadouts that in aren't the standard set.
         for payload_override in db.EXPANDED_TASK_PAYLOAD_OVERRIDE.get(self.flight.flight_type.name):