Defer notification area rendering until app ready.

Signed-off-by: Akos Kitta <a.kitta@arduino.cc>

arduino-ide-extension/src/browser/theia/messages/notifications-renderer.tsx

@@ -1,12 +1,29 @@
 import * as React from '@theia/core/shared/react';
 import * as ReactDOM from '@theia/core/shared/react-dom';
-import { injectable } from '@theia/core/shared/inversify';
+import {
+  inject,
+  injectable,
+  postConstruct,
+} from '@theia/core/shared/inversify';
 import { NotificationCenterComponent } from './notification-center-component';
 import { NotificationToastsComponent } from './notification-toasts-component';
 import { NotificationsRenderer as TheiaNotificationsRenderer } from '@theia/messages/lib/browser/notifications-renderer';
+import { FrontendApplicationStateService } from '@theia/core/lib/browser/frontend-application-state';
 
 @injectable()
 export class NotificationsRenderer extends TheiaNotificationsRenderer {
+  @inject(FrontendApplicationStateService)
+  private readonly appStateService: FrontendApplicationStateService;
+
+  @postConstruct()
+  protected override init(): void {
+    // Unlike Theia, IDE2 renders the notification area only when the app is ready.
+    this.appStateService.reachedState('ready').then(() => {
+      this.createOverlayContainer();
+      this.render();
+    });
+  }
+
   protected override render(): void {
     ReactDOM.render(
       <div>