Fix display of no triggers text if no device is selected or device has no triggers (#3592)

src/components/device/ha-device-trigger-picker.ts

@@ -37,7 +37,10 @@ class HaDeviceTriggerPicker extends LitElement {
   @property() private _renderEmpty = false;
 
   private get _key() {
-    if (!this.value) {
+    if (
+      !this.value ||
+      deviceAutomationTriggersEqual(this._noTrigger, this.value)
+    ) {
       return NO_TRIGGER_KEY;
     }
 

src/panels/config/js/trigger/device.js

@@ -49,4 +49,6 @@ export default class DeviceTrigger extends Component {
 
 DeviceTrigger.defaultConfig = {
   device_id: "",
+  domain: "",
+  entity_id: "",
 };