[FIX] web_editor: include selected td's descendants in getTraversedNodes

When a td has the `o_selected_td` class, it should be included in the
traversed/selected nodes, along with all its descendants. A syntax error
made it so that the descendants weren't in fact included.

closes odoo/odoo#112669

X-original-commit: 9f9279babbd98c343f51028fc719d7d9f1b2f887
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>

addons/web_editor/static/src/js/editor/odoo-editor/src/utils/utils.js

@@ -669,7 +669,8 @@ export function getTraversedNodes(editable, range = getDeepRange(editable)) {
             const selectedTable = closestElement(node, '.o_selected_table');
             if (selectedTable) {
                 for (const selectedTd of selectedTable.querySelectorAll('.o_selected_td')) {
-                    traversedNodes.add(selectedTd, ...descendants(selectedTd));
+                    traversedNodes.add(selectedTd);
+                    descendants(selectedTd).forEach(descendant => traversedNodes.add(descendant));
                 }
             } else {
                 traversedNodes.add(node);
@@ -692,7 +693,7 @@ export function getSelectedNodes(editable) {
         return [];
     }
     const range = sel.getRangeAt(0);
-    return getTraversedNodes(editable).flatMap(
+    return [...new Set(getTraversedNodes(editable).flatMap(
         node => {
             const td = closestElement(node, '.o_selected_td');
             if (td) {
@@ -703,7 +704,7 @@ export function getSelectedNodes(editable) {
                 return [];
             }
         },
-    );
+    ))];
 }
 
 /**