FEAT #14949 TIME 0:02 check if attachment is signed

src/frontend/app/signature-book.component.html

@@ -274,7 +274,7 @@
                             <i title="{{'lang.unsign' | translate}}" class="fa fa-check fa-2x" aria-hidden="true"></i>
                         </span>
                         <ng-template  #elseBlock>
-                            <div class="alert-message alert-message-danger"
+                            <div *ngIf="signatureBook.attachments[rightSelectedThumbnail].signed" class="alert-message alert-message-danger"
                                 style="width: 100%; margin: 10px 0; font-size: 20px;">
                                 <i class="fas fa-exclamation" style="width: 25px;text-align: center;"></i>&nbsp;<span [innerHTML]="'lang.youCannotUnsign' | translate"></span>
                             </div>