Added
- The `small screen navigation` option under `features`.
- The `email template`, `email subject`, `email body`, and `email
address default` options for customizing the functionality of the
`attachment`/`attachment code` interface.
Changed
- The horizontal section interface is no longer hidden on small
screens.
- The vertical section interface becomes the horizontal section
interface on small screens.
- The default body of the e-mail that the user can send from an
`attachment`/`attachment code` interface is now translated using the
phrases `Your document, %s, is attached.` and `Your documents, %s, are
attached.`.