ha: send discovery on reconnect

code/espurna/homeassistant.ino

@@ -526,7 +526,7 @@ void haSetup() {
     // On MQTT connect check if we have something to send
     mqttRegister([](unsigned int type, const char * topic, const char * payload) {
         if (type == MQTT_CONNECT_EVENT) _haSend();
-        if (type == MQTT_DISCONNECT_EVENT) _ha_send_flag = false;
+        if (type == MQTT_DISCONNECT_EVENT) _ha_send_flag = _ha_enabled;
     });
 
     // Main callbacks