mcustomscrollbar breaks chat inside cross-domain iframe

[luxaritas]

We planned for www.eternagame.org to (temporarily) load the chat from irc.eternagame.org as an iframe. A bug in the custom scrollbar causes an error when this happens.

There is a patch for this at malihu/malihu-custom-scrollbar-plugin#451, but apparently, the repo is not maintained. Should we fork it and merge in the fix (@Omei, I think this would be up to you)? Or should we use a different library? This will be replaced once the rewrite happens anyhow (assuming we use Vue, we should ditch jQuery as a dependency).

[luxaritas]

Two examples:
https://github.com/noraesae/perfect-scrollbar
https://github.com/idiotWu/smooth-scrollbar

[guyguy2001]

May I patch any of them in? If so, are there any preferences to which?

[luxaritas]

@guyguy2001 Preferences to which what?

[guyguy2001]

Which library to use

[luxaritas]

Frankly, what I care about is that it works and it looks ok. :)

[luxaritas]

Resolved in 3201bac