更新记录：
- 🎉 支持演示模式，去试试 command + 4
- 🎉 支持文档自动排版，去试试 command + shift + L
- 🐱 给汤圆可乐增加了一个喂罐头的 页面
- 😂 支持预览模式下，全选右键复制富文本到其他地方
- 🛠 修复设置中选中当前项也重置、完成对 Mojave 系统的兼容
Update Notes：
- 🎉 Support presentation mode, go try command + 4
- 🎉 Support document auto typesetting, go try command + shift + L
- 🐱 Added a page for feeding cans to TangYuan and Cola.
- 😂 Support preview mode, full right click copy rich text to other places.
- 🛠 Fixed reset of selected current item in settings, completed compatibility with Mojave system.