Add mdns and flash write settings

supersensor.yaml

@@ -205,6 +205,9 @@ script:
             id(supersensor_occupancy).publish_state(false);
           }
 
+preferences:
+  flash_write_interval: 5min
+
 logger:
   level: INFO
   baud_rate: 115200
@@ -218,6 +221,9 @@ web_server:
 
 captive_portal:
 
+mdns:
+  disabled: false
+
 wifi:
   ap: {}
   domain: ""