When you visit https://en.wikipedia.org/wiki/Main_Page and inspect the body element, you'll notice that it has feature-footer-v2 class
Note that previously, it also had the feature-page-action-bar-v2 class.
Our feature flagged classes should only apply to the Minerva skin.
- Do not leak any feature classes to vector (or any skin other than Minerva). Hook should only run on Minerva (and probably be in the skins hooks)