Hides the offline presence dot from old reddit. Only hides offline presence, so you notice if you're displayed as online. https://old.reddit.com/r/changelog/comments/lx08r2/announcing_online_presence_indicators/
目前為 2021-03-04 提交的版本，檢視 最新版本。
這裡只顯示彼此間有代碼差異的版本。 顯示所有版本。
Make script run on document start to help on dot flashes, Handle document.head not being ready yet.
