Steps to reproduce:
(I have a testing wiki https://srwiki-dev.wmflabs.org and if you want you can register there so you can test this, I will give you an admin right, it runs alpha version of MediaWiki with auto-update which happens each Thursday.)
- Go on Special:Nuke
- Type username in related box:
- Click on List pages
Buttons, checkboxes, inputbox aren't converted to the OOUI standard. See:
Special:Nuke should be converted into the OOUI completly.