Fix
- Add finer-grained persist markdown state option #306
- Support configuring delay for persist markdown state
- Fix several issues with pdf navigate
- Support locating headings in pdf view
修复
- 添加更细粒度的 persist markdown state 选项 #306
- 支持设置 persist markdown state 延时
- 解决 pdf navigate 的一些问题
- 支持 locate heading in pdf view