[ADF-4424] Pdf Viewer - password dialog does not close when pressing Escape (#4622)

* return to previous page on close

* update e2e

* [ADF-4424] Improve PreviousRouteService to use it in pdfViewer

* change previous Url logic

* remove navigation logic

* remove test

* Update pdfViewer.component.spec.ts

* back button logic for viewer outlet

* unit tests

* remove fdescribe

* remove unused service

* e2e

* return to location

* remove click filter step

* remove unnecessary test steps

* remove un existen export

* unify preview between PS and CS in demo shell

* fix dispalyname property

demo-shell/src/app/app.routes.ts

@@ -93,7 +93,7 @@ export const appRoutes: Routes = [
         children: [
             {
                 path: '',
-                loadChildren: 'app/components/blob-preview/blob-preview.module#BlobPreviewModule'
+                loadChildren: 'app/components/file-view/file-view.module#FileViewModule'
             }
         ]
     },