Trying 800ms pre-load delay

frontend/src/app/app.preloading-strategy.ts

@@ -4,7 +4,7 @@ import { Observable, timer, mergeMap, of } from 'rxjs';
 export class AppPreloadingStrategy implements PreloadingStrategy {
   preload(route: Route, load: Function): Observable<any> {
       return route.data && route.data.preload 
-          ? timer(150).pipe(mergeMap(() => load()))
+          ? timer(800).pipe(mergeMap(() => load()))
           : of(null);
     }
 }