[ADF-2569] fix reload app.config.json (#3124)

* fix reload app.config.json

* improve style mobile
fix test

* test karma setup update

* fix core providers test

* remove unused providers

* use mock api in service test

* skip test in the wrong place

* remove comma

* remove fdescribe

lib/core/language-menu/language-menu.component.spec.ts

@@ -22,7 +22,6 @@ import { DirectiveModule } from '../directives/directive.module';
 import { MaterialModule } from '../material.module';
 import { AppConfigService } from '../app-config/app-config.service';
 import { TranslateLoaderService } from '../services/translate-loader.service';
-import { UserPreferencesService } from '../services/user-preferences.service';
 
 import { LanguageMenuComponent } from './language-menu.component';
 
@@ -49,8 +48,7 @@ describe('LanguageMenuComponent', () => {
                 LanguageMenuComponent
             ],
             providers: [
-                AppConfigService,
-                UserPreferencesService
+                AppConfigService
             ]
         }).compileComponents();
     }));