1. 修复评论页面鼠标滚轮速度未变化的bug
2. 修复详情页快捷键bug
3. 改变下载路径时进行提示
4. 提升搜索体验
5. 修复里站509时检测出错的bug

1. Fix bug with mouse wheel speed in comment page
2. Fix bug with shortcut keys in detail page
3. Add loading indicator when changing download path
4. Improve search experience
5. Fix bug when exceed image quota for EX site