add feedback button, load administration module from app module

src/app/app.component.html

@@ -5,6 +5,7 @@
 			<router-outlet></router-outlet>
 		</main>
 		<app-footer></app-footer>
+		<app-feedback></app-feedback>
 	</div>
 </div>
 

src/app/app.module.ts

@@ -20,9 +20,9 @@ import { environment } from '../environments/environment';
 import { AppRoutingModule } from './app-routing.module';
 import { AppComponent } from './app.component';
 import { CoreModule } from './core/core.module';
-import { OldStuffModule } from './features/old-stuff/old-stuff.module';
 import { SharedModule } from './shared/shared.module';
 import { ParticipationModule } from './features/participation/participation.module';
+import { AdministrationModule } from './features/administration/administration.module';
 
 export class MyMissingTranslationHandler implements MissingTranslationHandler {
 	public handle(params: MissingTranslationHandlerParams): string {
@@ -38,6 +38,7 @@ export function HttpLoaderFactory(http: HttpClient): TranslateHttpLoader {
 	declarations: [AppComponent],
 	imports: [
 		AppRoutingModule,
+		AdministrationModule,
 		BrowserAnimationsModule,
 		BrowserModule,
 		ClipboardModule,