Add code-block dialog and style it.

frontend/src/app/pages/publication-edition/publication-edition.component.ts

@@ -112,6 +112,10 @@ export class PublicationEditionComponent implements OnInit, OnDestroy {
     this.publicationEditionService.insertLink();
   }
 
+  displayCodeBlockDialog(): void {
+    this.publicationEditionService.displayCodeBlockDialog();
+  }
+
   save(): void {
     this.publicationEditionService.save();
   }