The list of categories to be collapsed when displayed. Valid categories are: default, history, documents, emails, conversations, files, people, places, actions, web, websearch, news and notes.

• 显示时可被折叠起来的列表。有效的类别是：历史，文档，电子邮件，会话，文件，人，位置，动作，网页，网页搜索，新闻和便签。