Fix clearing device in device action (#11594)

src/panels/config/automation/action/types/ha-automation-action-device_id.ts

@@ -107,6 +107,11 @@ export class HaDeviceAction extends LitElement {
   private _devicePicked(ev) {
     ev.stopPropagation();
     this._deviceId = ev.target.value;
+    if (this._deviceId === undefined) {
+      fireEvent(this, "value-changed", {
+        value: HaDeviceAction.defaultConfig,
+      });
+    }
   }
 
   private _deviceActionPicked(ev) {

src/panels/config/automation/condition/types/ha-automation-condition-device.ts

@@ -111,6 +111,11 @@ export class HaDeviceCondition extends LitElement {
   private _devicePicked(ev) {
     ev.stopPropagation();
     this._deviceId = ev.target.value;
+    if (this._deviceId === undefined) {
+      fireEvent(this, "value-changed", {
+        value: { ...HaDeviceCondition.defaultConfig, condition: "device" },
+      });
+    }
   }
 
   private _deviceConditionPicked(ev) {

src/panels/config/automation/trigger/types/ha-automation-trigger-device.ts

@@ -111,6 +111,11 @@ export class HaDeviceTrigger extends LitElement {
   private _devicePicked(ev) {
     ev.stopPropagation();
     this._deviceId = ev.target.value;
+    if (this._deviceId === undefined) {
+      fireEvent(this, "value-changed", {
+        value: { ...HaDeviceTrigger.defaultConfig, platform: "device" },
+      });
+    }
   }
 
   private _deviceTriggerPicked(ev) {

src/panels/developer-tools/state/developer-tools-state.js

@@ -400,7 +400,7 @@ class HaPanelDevState extends EventsMixin(LocalizeMixin(PolymerElement)) {
   }
 
   entityIdChanged() {
-    if (this._entityId === "") {
+    if (!this._entityId) {
       this._entity = undefined;
       this._state = "";
       this._stateAttributes = "";