Fix for app initialization

Author: acockburn

appdaemon/app_management.py

@@ -268,6 +268,7 @@ async def initialize_app(self, app_name: str):
             raise ade.BadInitializeMethod(f"Wrong number of arguments for initialize method of {class_name}")
 
         # Call its initialize function
+        await self.set_state(app_name, state="initializing")
         self.logger.info(f"Calling initialize() for {app_name}")
         if asyncio.iscoroutinefunction(init_func):
             await init_func()