Apr 11 2021
Now that I have CreateWiki and ManageWiki working on my local MediaWiki install, I will attempt to start working on some of these changes when I get the chance.
Apr 10 2021
The database name is exactly what it sounds like, it is the name of the database that holds all of your wiki's data (including page contents, revisions, local users, etc). The naming scheme for wikis on Miraheze is "<subdomain>wiki", so a wiki with the url https://meta.miraheze.org/ would have the database name "metawiki". When renaming a wiki, the database is also renamed to reflect the new subdomain for the wiki, because if we were to not do this it could cause a database conflict if someone were to create a new wiki with the same subdomain that your wiki used to have.
Apr 9 2021
Structured Discussions is not enabled anywhere by default, you will need to enable it manually.
Apr 7 2021
While I don't think I'll have time to do this, I will say that this should be done in some way as an error instead.
if you are removing the managewiki right from the only group that it is still contained within, error.
if you are removing the ManageWiki right from the last group with users in, error
It looks like this issue is not caused by deleting user groups as the original post stated, but is rather caused when someone attempts to create a user group that has no rights assigned.
Apr 5 2021
PR was merged.
Done in pull request #3815. Sorry about the initial confusion.
It looks like the documentation has lied to me... I will create another pull request to define $wgLinkTitlesFirstOnly shortly.
When I looked in the documentation for LinkTitles, it said that $wgLinkTitlesFirstOnly defaults to false already.
Done in pull request #3814.
Apr 4 2021
The reason it did not work is because you have your entire Common.js wrapped in a mw.loader call with a dependency on mediawiki.notification, which was not loading, so the callback is never called. Removing this dependency should allow your code to work again.
Apr 3 2021
Universal_Omega almost had it right, but the desired portletId would be p-personal instead of p-tb.
The Timeless skin is installed on all Miraheze wikis by default. You can set it as the default on your wiki on the Special:ManageWiki/settings page on your wiki, under the "Styling" tab.