CLC-2338 - Update all buttons to use the new design

https://jira.media.berkeley.edu/jira/browse/CLC-2338

* My Academics: show / hide blocks
* Footer: Basic auth / Opt out + yes/no
* Settings: Admin API test / Act As / Add/Remove google access
* Reminder: Go to settings / Dismiss

Only button that is not using the regular design is the Login button on the splash page