[NAE-1678] User impersonation

- improvements based on machacjozef PR comments

Author: timbez

projects/nae-example-app/src/app/app.module.ts

@@ -154,7 +154,7 @@ export function HttpLoaderFactory(http: HttpClient) {
         WrapperEmptyViewComponent,
         DoubleDrawerExampleComponent,
         PublicSingleTaskViewComponent,
-        BreadcrumbsExampleComponent,
+        BreadcrumbsExampleComponent
     ],
     imports: [
         BrowserModule,

projects/netgrif-components-core/src/lib/impersonation/public-api.ts

@@ -1,5 +1,6 @@
 /* MODELS */
 export * from './models/user-impersonation-constants';
+export * from './models/user-impersonate-config-metadata';
 
 /* SERVICES */
 export * from './services/impersonation.service';