Method refresh

web/pgadmin/static/js/tree/tree.js:93–99

(item)

  }

  async refresh(item) {
    //  Set _children to null as empty array not reload the children nodes on refresh.
    if(item.children?.length == 0) {
      item._children = null;
    }
    await this.tree.refresh(item);
  }

  async add(item, data) {
    await this.tree.create(item.parent, data.itemData);