Update to angular 15 & related frontend packages

src-ui/src/app/app-routing.module.ts

@@ -61,7 +61,7 @@ const routes: Routes = [
 ]
 
 @NgModule({
-  imports: [RouterModule.forRoot(routes, { relativeLinkResolution: 'legacy' })],
+  imports: [RouterModule.forRoot(routes)],
   exports: [RouterModule],
 })
 export class AppRoutingModule {}

src-ui/src/app/app.module.ts

@@ -200,7 +200,7 @@ function initializeApp(settings: SettingsService) {
     PdfViewerModule,
     NgSelectModule,
     ColorSliderModule,
-    TourNgBootstrapModule.forRoot(),
+    TourNgBootstrapModule,
   ],
   providers: [
     {