[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/form/components/widgets/date-time/date-time.widget.spec.ts

@@ -25,7 +25,6 @@ import { FormService } from './../../../services/form.service';
 import { FormFieldModel } from './../core/form-field.model';
 import { FormModel } from './../core/form.model';
 import { DateTimeWidgetComponent } from './date-time.widget';
-import { UserPreferencesService } from '../../../../services/user-preferences.service';
 
 describe('DateTimeWidgetComponent', () => {
 
@@ -44,7 +43,6 @@ describe('DateTimeWidgetComponent', () => {
             ],
             providers: [
                 FormService,
-                UserPreferencesService,
                 EcmModelService,
                 ActivitiContentService
             ]

lib/core/form/components/widgets/widget.component.spec.ts

@@ -31,7 +31,6 @@ describe('WidgetComponent', () => {
 
     beforeEach(async(() => {
         TestBed.configureTestingModule({
-            imports: [],
             declarations: [WidgetComponent],
             providers: [
                 FormService,