Make metadata simple, clearer and less flappy.

 - Remove flappy js info box.
 - Add published and conditional last updated info.
 - Anchor history at bottom of page to metadata at top of page.
 - Expand history when 'see all updates' anchor link is clicked.
Fix ordering of change note translation keys
Merge pull request #1737 from alphagov/publication_page_history

Make publication metadata simpler, clearer and less flappy.