Summary:
Ref T10054. I think this gets everything except:
- circles on icons;
- I spent ~15 minutes poking at animations but wasn't able to get anything that looked reasonable whatsoever.
Test Plan:
- Collapsed menus.
- Expanded menus.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10054
Differential Revision: https://secure.phabricator.com/D15056
