In a00f5dd90e, we needed to move the
`alert-box` styles from alerts.css to be visible in portico pages.
However, when doing so, we incorrectly moved all of alerts.css, which
also has styles for `alert` and` alert-error` designed to make it
convenient to include hidden elements for potential errors in the
webapp settings UIs directly in the HTML template (and then use
show/hide to manage them).
We fix this by moving just the alert-box scope to the common
components.css module, which is designed as the place for styles
shared between the webapp and portico pages.
This fixes an issue where the error messages for wrong password and
the like were invisible :(.
85b3157b47