Finished scap sync-world: Backport for [[gerrit:1251034|Update CSS selector for Mobile TOC button (T419587)]], [[gerrit:1251035|Update CSS selector for Mobile TOC button (T419587)]], [[gerrit:1251036|Remove queueing logic (T419587)]], [[gerrit:1251037|Remove queueing logic (T419587)]] (duration: 07m 15s)