[ADF-1412] Viewer enhancements (#2873)

* collection navigation support for Viewer

* code cleanup

* full screen mode support

* keyboard shortcuts

* zooming scale label

* layout fixes

* test fixes

* image toolbar with basic tranformations

* test fixes

* test fixes

lib/core/viewer/components/imgViewer.component.spec.ts

@@ -21,6 +21,8 @@ import { AlfrescoApiService } from '../../services/alfresco-api.service';
 import { AuthenticationService } from '../../services/authentication.service';
 import { ContentService } from '../../services/content.service';
 import { SettingsService } from '../../services/settings.service';
+import { MaterialModule } from '../../material.module';
+import { ToolbarModule } from '../../toolbar/toolbar.module';
 
 import { ImgViewerComponent } from './imgViewer.component';
 
@@ -38,7 +40,10 @@ describe('Test Img viewer component ', () => {
 
     beforeEach(async(() => {
         TestBed.configureTestingModule({
-
+            imports: [
+                MaterialModule,
+                ToolbarModule
+            ],
             declarations: [ImgViewerComponent],
             providers: [
                 SettingsService,