Correct path to i18n dictionaries (#2249)

The path to i18n could not be accessed by HttpClient because it is intervened by the general interceptor, in this change we use HttpClient without the interceptor, which allows the files to be loaded directly from the real path as a standard asset.

src/app/app.module.ts

@@ -2,7 +2,7 @@
 import { NgModule } from '@angular/core';
 import { BrowserModule } from '@angular/platform-browser';
 import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
-import { HttpClient, HttpClientModule } from '@angular/common/http';
+import { HttpBackend, HttpClient, HttpClientModule } from '@angular/common/http';
 
 /** Environment Configuration */
 
@@ -58,15 +58,12 @@ export function HttpLoaderFactory(http: HttpClient) {
     TranslateModule.forRoot({
       loader: {
         provide: TranslateLoader,
-        useFactory: (http: HttpClient, locationStrategy: LocationStrategy) => {
-          return new TranslateHttpLoader(
-            http,
-            `${window.location.protocol}//${window.location.host}${locationStrategy.getBaseHref()}/assets/translations/`,
-            '.json'
-          );
+        useFactory: (httpBackend: HttpBackend, locationStrategy: LocationStrategy) => {
+          const http = new HttpClient(httpBackend);
+          return new TranslateHttpLoader(http, `/assets/translations/`, '.json');
         },
         deps: [
-          HttpClient,
+          HttpBackend,
           LocationStrategy
         ]
       }