Remove autofocus from title and alt title fields

* Autofocus was causing the page to scroll down when opened, leading to
users missing vital important notes at the top of the page
Merge pull request #291 from alphagov/stop-auto-scroll

Remove autofocus to prevent page scrolling
Remove "alternate title" field from publisher

This removes the functionality to create and edit alternate titles for
editions within publisher. The intention is to get this change
deployed first before making an export of the data before it's finally
removed from the respective dependencies (govuk_content_models) and
database.

Story: https://www.agileplannerapp.com/boards/173808/cards/8145
Add task to export editions that have an alternative title