bundles/infobeamer-monitor: improve code a bit

bundles/infobeamer-monitor/files/monitor.py

@@ -117,6 +117,7 @@ while True:
                             LOG.info("device {} is now {}".format(did, online_status))
                             mqtt_out(
                                 f"online status changed to {online_status}",
+                                level="INFO" if device["is_online"] else "WARN",
                                 device=device,
                             )
                             if device["is_online"]:
@@ -131,6 +132,7 @@ while True:
                                     level="WARN",
                                     device=device,
                                 )
+                                must_dump_state = True
 
                         if (
                             device["is_synced"] != state[did]["is_synced"]