fix: la documentation s'ouvre dans une nouvelle onglet

ui/ui-frontend/projects/pastis/src/app/user-actions/download-doc/download-doc.component.ts

 /*
-Copyright © CINES - Centre Informatique National pour l'Enseignement Supérieur (2020) 
+Copyright © CINES - Centre Informatique National pour l'Enseignement Supérieur (2020)
 
 [dad@cines.fr]
 
-This software is a computer program whose purpose is to provide 
-a web application to create, edit, import and export archive 
+This software is a computer program whose purpose is to provide
+a web application to create, edit, import and export archive
 profiles based on the french SEDA standard
 (https://redirect.francearchives.fr/seda/).
 
 
 This software is governed by the CeCILL-C  license under French law and
-abiding by the rules of distribution of free software.  You can  use, 
+abiding by the rules of distribution of free software.  You can  use,
 modify and/ or redistribute the software under the terms of the CeCILL-C
 license as circulated by CEA, CNRS and INRIA at the following URL
-"http://www.cecill.info". 
+"http://www.cecill.info".
 
 As a counterpart to the access to the source code and  rights to copy,
 modify and redistribute granted by the license, users are provided only
 with a limited warranty  and the software's author,  the holder of the
 economic rights,  and the successive licensors  have only  limited
-liability. 
+liability.
 
 In this respect, the user's attention is drawn to the risks associated
 with loading,  using,  modifying and/or developing or reproducing the
@@ -28,9 +28,9 @@ that may mean  that it is complicated to manipulate,  and  that  also
 therefore means  that it is reserved for developers  and  experienced
 professionals having in-depth computer knowledge. Users are therefore
 encouraged to load and test the software's suitability as regards their
-requirements in conditions enabling the security of their systems and/or 
-data to be ensured and,  more generally, to use and operate it in the 
-same conditions as regards security. 
+requirements in conditions enabling the security of their systems and/or
+data to be ensured and,  more generally, to use and operate it in the
+same conditions as regards security.
 
 The fact that you are presently reading this means that you have had
 knowledge of the CeCILL-C license and that you accept its terms.
@@ -50,12 +50,7 @@ export class UserActionsDownloadDocComponent implements OnInit {
   }
 
   downloadDocumentation(){
-    let link = document.createElement('a');
-    link.setAttribute('type', 'hidden');
-    link.href = 'assets/doc/VITAM UI - Documentation APP - PASTIS.pdf';
-    document.body.appendChild(link);
-    link.click();
-    link.remove();
+    window.open('assets/doc/VITAM UI - Documentation APP - PASTIS.pdf');
   }
 
 }