Add confirmation dialog to delete publications.

frontend/src/app/components/confirmation-dialog/confirmation-dialog.component.html

@@ -0,0 +1,10 @@
+<h1>{{title}}</h1>
+<h2>{{description}}</h2>
+<footer>
+    <button type="button" class="secondary" (click)="closeDialog()">
+        No
+    </button>
+    <button type="button" (click)="closeAndValidate()">
+        Yes
+    </button>
+</footer>