Issue #2022875 by Berdir, alexpott, Xano, swentel, tim.plunkett, vladan.me: Resolve difference between submitForm(), submit(), and save() in EntityFormController.
Issue #2238149 by Berdir: Apply formatters and widgets in EntityTestFormCotroller.
Revert "Issue #2238149 by Berdir: Apply formatters and widgets in EntityTestFormCotroller."

This reverts commit 3ac426f9cbb63fe28b0d0a67f64f8b683e0a384b.
Issue #2330943 by herom: Remove mention of hook_date_format_types() in docs.
Issue #2332577 by Berdir: Remove EntityDatabaseStorage.