[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

lib/core/viewer/components/viewer.component.html

@@ -171,7 +171,7 @@
                     <div class="adf-viewer-content-container" [ngSwitch]="viewerType">
 
                         <ng-container *ngSwitchCase="'pdf'">
-                            <adf-pdf-viewer [thumbnailsTemplate]="thumbnailsTemplate" [allowThumbnails]="allowThumbnails" [blobFile]="blobFile" [urlFile]="urlFileContent" [nameFile]="displayName"></adf-pdf-viewer>
+                            <adf-pdf-viewer (close)="onBackButtonClick()" [thumbnailsTemplate]="thumbnailsTemplate" [allowThumbnails]="allowThumbnails" [blobFile]="blobFile" [urlFile]="urlFileContent" [nameFile]="displayName"></adf-pdf-viewer>
                         </ng-container>
 
                         <ng-container *ngSwitchCase="'image'">