signals: add SignalsDisplay to simplify installation

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/app/src/App.tsx

@@ -73,8 +73,7 @@ import { DelayingComponentFieldExtension } from './components/scaffolder/customS
 import { defaultPreviewTemplate } from './components/scaffolder/defaultPreviewTemplate';
 import { searchPage } from './components/search/SearchPage';
 import { providers } from './identityProviders';
-import * as plugins from './plugins';
-
+import { SignalsDisplay } from '@backstage/plugin-signals';
 import { techDocsPage } from './components/techdocs/TechDocsPage';
 import { RequirePermission } from '@backstage/plugin-permission-react';
 import { catalogEntityCreatePermission } from '@backstage/plugin-catalog-common/alpha';
@@ -86,7 +85,6 @@ import { NotificationsPage } from '@backstage/plugin-notifications';
 
 const app = createApp({
   apis,
-  plugins: Object.values(plugins),
   icons: {
     // Custom icon example
     alert: AlarmIcon,
@@ -217,6 +215,7 @@ export default app.createRoot(
   <>
     <AlertDisplay transientTimeoutMs={2500} />
     <OAuthRequestDialog />
+    <SignalsDisplay />
     <AppRouter>
       <VisitListener />
       <Root>{routes}</Root>

packages/app/src/plugins.ts

@@ -1,20 +0,0 @@
-/*
- * Copyright 2020 The Backstage Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-// TODO(Rugvip): This plugin is currently not part of the app element tree,
-//               ideally we have an API for the context menu that permits that.
-export { homePlugin } from '@backstage/plugin-home';
-export { signalsPlugin } from '@backstage/plugin-signals';