Add support for all sites that use Ace editor

[ewen-lbh]

ref: https://ace.c9.io/#nav=production

overleaf uses ace (judging by the html classname, .ace_cursor), so implementing support for others should be easy.

notable sites on that list:

• wikipedia
• khan academy (will see if i can test this though, if its limited to a teacher admin panel i can't)
• aws (where though?)
• codecademy
• codingame
• owncloud

(hoping the list they give is up to date lmao)