Fix UI hang from refreshing params too fast (#1080)

* Hacky fix for params load

* More stable solution

* For some reason this is KEY

* Add back condition so loop can be ended externally

* Found the bug!

* Handle edge cases

Author: Turnlings

radio/app/controllers/paramsController.py

@@ -120,6 +120,11 @@ def getAllParams(self) -> None:
         )
         self.getAllParamsThread.start()
 
+        # Wait so param_fetch_all doesn't silently return
+        start = getattr(self.drone.master, "param_fetch_start", 0.0)
+        elapsed = time.time() - start
+        time.sleep(max(0.0, 2.0 - elapsed))
+
         self.drone.master.param_fetch_all()
 
     def getAllParamsThreadFunc(self) -> None: