i18n: Complete look and feel for translatable widget
i18n: Fixup header and footer language hints
forms: Use select_related for dynamic form objects

Link entry and form and entryAnswer and field. This will alleviate extra
queries which would otherwise be required.
i18n: pages: Use vertical tabs UI for translations
i18n: Make secondary languages sortable

Also fix syntax error preventing deletes and drop the [manage all phrases]
feature for now.
i18n: Add vertical tabs to the content management dialog
i18n: Add autodetect support for staff timezone