The vertical alignment issue impacts the BlockMessageDrawer:
Search within pages is also flushed incorrectly:
Acceptance criteria
- Introduce mw-ui-icon-flush-top to mediawiki ui (https://gerrit.wikimedia.org/r/537529) - this will automatically fix the BlockMessageDrawer which is prematurely using the class that doesn't exist.
- Use mw-ui-icon-flush-left on the search within pages icon