Collapses all folders on load and adds Collapse All button
当前为 2019-11-19 提交的版本，查看 最新版本。
这些是此脚本变更过代码的版本。 显示所有版本。
Seems v1.0.8 broke some things, so I've reverted the code back to v1.0.6.
Rewritten to remove usage of MutationObserver since it seemed to be an issue when refreshing the page and upon further tests does not seem needed. If the script breaks for you, let me know.
