21-282 Enable preloading

src/app/app-routing.module.ts

@@ -1,5 +1,5 @@
 import { NgModule } from '@angular/core';
-import { Routes, RouterModule } from '@angular/router'
+import { Routes, RouterModule, PreloadAllModules } from '@angular/router'
 
 import { ShoppingListComponent } from './shopping-list/shopping-list.component';
 import { HomeComponent } from './core/home/home.component';
@@ -11,7 +11,9 @@ const appRoutes: Routes = [
 ];
 
 @NgModule({
-    imports: [RouterModule.forRoot(appRoutes)],
+    imports: [
+        RouterModule.forRoot(appRoutes, {preloadingStrategy: PreloadAllModules})
+    ],
     exports: [RouterModule]
 })
 export class AppRoutingModule {