Background
As a part of T399175: [EPIC] Refine Codex icon library the Codex icons were redesigned. The previous set of icons had arrows and chevrons that were designed in a way that meant during implementation, they commonly had to be made a smaller size so to be more visually balanced. The new icon set redesigned these icons, specifically expand, collapse, upTriangle, and downTriangle to be visually balanced with the overall set by default. This means, the downstream resizing now makes the icon too small.
Goal
We should understand all the places this is happening, using something like this code search query, then see if in production it feels like an icon sizing bug, document it then address it, likely by removing the resizing part of the mixin.
Audit
- Enhanced watchlist (solved in T429642)
- Language switcher
- User menu
- Table of contents expander
- Browse history interactively in diffs
- Where else?
Acceptance criteria
- Document all known instances of the arrow/chevron resizing happening in this task
- Determine which from the audit need to be addressed
- Fix those which should be addressed



