Issue #2227973 by pfrenssen, Berdir: Rename ContentTranslationController to ContentTranslationHandler.

Issue #2203065 by lokapujya, cwells: Adjust assertFormatterRdfa() parameters to allow for more advanced testing.

Issue #2228885 by Sweetchuck: Error message is attached to a non exists element  when table prefix is wrong.

Issue #2159471 by dawehner: Ordering of local tasks is arbitrary for derivative-based tasks of the same weight.

Issue #2100311 by killua99, yannickoo: Allow filtering of modules by arbitrary search strings on the uninstall page.

Issue #2207229 by larowlan, jibran: Attempt to use 'Parent Term' relationship results in broken/missing handler.

Issue #1933636 by sun: PhpStorage\FileStorage tries to write a file using the same name of MTimeProtectedFileStorage's directory name.

Issue #1512424 by Xano, YesCT, RobLoach: Add a LanguageInterface, and property setters/getters to Language class.

Issue #2217783 by mondrake: Remove $extension and $mimeType from Image, use image_type_to_xxx function in the getters instead.

Issue #2154711 followup by by jlbellido: Move entity_get_(form/view)_mode_options() functions to EntityManager and add get(Form/View)ModeOptions() methods.

Issue #2185617 by Wim Leers, voidberg, drifter: Each page cache entry should have a theme cache tag.

Issue #70719 by neclimdul, superspring, longwave, kscheirer, InternetDevels: Add Unicode::ucwords() and Unicode::lcfirst() implementation and make use of them in core.

Issue #1662954 by balis_m, mjonesdinero, kalpaitch, IshaDakota, kerasai, ckrina, BarisW | ZenDoodles: Use less-specific tabledrag selectors.

Issue #1808248 by alexpott, beejeebus, tayzlor, Nitesh Sethia: Add a separate module install/uninstall step to the config import process.

Issue #2224861 by Wim Leers, dawehner, pwolanin: Cache SystemMenuBlock and BookNavigationBlock per active trail (currently cached per URL, this breaks on very long URLs).

Issue #2219689 followup by damiankloip: Separate out logic for getPluginTypes/viewsHandlerTypes from ViewExecutable.

Issue #2209145 by slashrsm, fgm, chx: Move all path alias SQL queries to a single storage controller.

Issue #2219689 by damiankloip: Separate out logic for getPluginTypes/viewsHandlerTypes from ViewExecutable.

Revert "Issue #2218039 by sun, dawehner: Render the maintenance/install page like any other HTML page."

Broke update.php.

This reverts commit 10b03890.

Issue #1709960 by Berdir, zserno, jessebeach | joachim: Declare a maximum length for entity and bundle machine names.