Extension:InternalWhitelist seems to have been unmaintained for some time, so I've forked it and moved it to my GitHub. As the first thing to do, I've migrated it from PHP entry point to JSON metadata file for extension registration (as described in Manual:Extension registration#Migration for extension developers) to bring it in accordance with the recent guidelines. Let me know if anyone is interested in contributing!
Topic on Extension talk:InternalWhitelist
Hello, @Пика Пика. I've created a script that inserts an item in the More dropdown menu in order to allow an easy management of the whitelisting process. At the moment the script works good and it is available via my user's page: InternalWhitelistManager.js, also there are provided some instructions.
Such script could be (optionally) loaded via a hook within the extension itself. I've forked you repository and will try to do that. Meanwhile I will update the extension's page with few tips.
Best Regards!