Changed the way drag and drop works in the page tree. The page has to be
selected first before moving.
Fixed a bug where the cms alias plugin leaks context into the rendered aliased plugins.
Fixed a bug where users without the “Change advanced settings” permission could still
change a page’s template.
Added on_delete to ForeignKey and OneToOneField to silence Django
deprecation warnings.
Fixed a bug where the sitemap would ignore the public setting of the site languages
and thus display hidden languages.
Fixed an AttributeError raised when adding or removing apphooks in Django 1.11.
Fixed an InconsistentMigrationHistory error raised when the contenttypes app
has a pending migration after the user has applied the 0010_migrate_use_structure migration.