After switching to Codex, we should clean up how we handle icons.
TODO
- Remove all .mw-ui-icon.*before selectors from icon packs that were kept for cached HTML.
- Remove minerva- and wikimedia- prefixes from selectors.
- CACHED HTML: For classes rendered on server side for anonymous users, make sure to cater for old class and new class.
Descoped
- For any icon rendered via JavaScript, use Codex mixins. e.g. skins.minerva.icons.images.scripts.misc and skins.minerva.icons.page.issues.* - Moved to T346162