Bug: Error handling

[moff4]

Looks like if decorated function raises error here, FunctionThread.running would not be set to False, and afterwards it won't be poped from list running_functions until the program ends. This can be a memory leak

This code can be a fix:

    def run(self):
        self.running = True
        now = datetime.now()
        try:
            if asyncio.iscoroutinefunction(self.function):
                asyncio.run(self.function(now))
            else:
                self.function(now)
        finally:
            self.running = False