When opening the export modal, limit selection to inside the modal. Generally when opening modals disable selection.

When selecting a DN on a DN fragment, autoselect the whole DN.

public/css/fixes.css

@@ -252,4 +252,9 @@ select2-container--bootstrap-5 .select2-selection--multiple .select2-selection__
 /* Stop showing a border on our user's drop down menu when open */
 .btn-check:checked+.btn, .btn.active, .btn.show, .btn:first-child:active, :not(.btn-check)+.btn:active {
 	border-color: var(--bs-btn-bg);
+}
+
+/* limit selection to inside the modal */
+body.modal-open {
+	user-select: none;
 }