updating common esphome sensors

finally fixing hvac-multisensor. All of this was caused by the display switch referenced the display while it wasn't plugged in. Updated code to check for the existence first.

esphome/common/wifi_dhcp.yaml

@@ -11,7 +11,8 @@ wifi:
 
   # Enable fallback hotspot (captive portal) in case wifi connection fails
   ap:
-    password: !secret EspHome_AP_PWD
+    ssid: "${friendly_name}"
+    password: !secret fallback_ap_password
 
 sensor:
   - <<: !include sensor/rssi_sensor.config.yaml