FIX #18282 TIME 0:30 can download non signed document with original format

src/app/resource/controllers/ResController.php

src/frontend/app/viewer/document-viewer.component.html

src/frontend/app/viewer/document-viewer.component.ts

...end/app/viewer/modal/document-viewer-modal.component.html

src/lang/lang-en.json

src/lang/lang-fr.json