Update panel Wi-Fi status indicator

esphome/sleepingroom-clock.yaml

@@ -165,6 +165,12 @@ wifi:
   fast_connect: on
   min_auth_mode: WPA2
 
+  # The panel uses the upper colon dot as its Wi-Fi connection indicator.
+  on_connect:
+    - lambda: id(panel)->set_online(true);
+  on_disconnect:
+    - lambda: id(panel)->set_online(false);
+
   # Enable fallback hotspot (captive portal) in case wifi connection fails
   ap:
     ssid: "Schlafzimmeruhr Fallback Hotspot"