Pure Writer: baixar versions anteriors

- Fix indentation issues
- Windows supports immersive full screen, see the menu, ESC key to exit
- Modify the center-edit menu function to be "the line where the cursor is" instead of the last line
- Linux and more: https://writer.drakeet.com/desktop_en
- * 修复 与 Android v23.9.0 缩进不兼容问题
- Windows 支持沉浸式全屏，请见菜单项，按 ESC 键可以退出
- 将居中的对象修改为“光标所在行”而不是最后一行
- Linux 及更多介绍： https://writer.drakeet.com/desktop_en
- For English or Latin, fixing the folded lines may produce bad results with spaces at the beginning of the folded lines
- If Linux system, need to uninstall the old version and reinstall the new (macOS & Windows do not need to follow this rule)
- 修复 对于英文折行时可能产生折下来的行首为空格的糟糕结果
- 修复当光标处于文章末尾，但其实末尾还有一些看不见的空行或空格在光标之后时，此时「垂直居中编辑」或「自动滚动」无效
- 新增小米字体，如果您的系统中安装有 MiSans Normal 这个字体，那么可以在纯纯写作桌面版字体选项中看到它
- 完美的「自动滚动编辑行到屏幕中央」功能现已实现