Issue #2185583 by longwave, InternetDevels: Allow to select "English" language via mouse click in installer language selection screen.

Issue #1992954 by lokapujya, sphism, cwells, djevans, Stefan Freudenberg, Gaelan: Trimming of long usernames results in incorrect RDF.

Issue #1778410 by linclark, ashepherd, Stefan Freudenberg, tim.plunkett, kay_v, adorsk: Throw exception when RDF namespaces collide.

Issue #2114707 by Berdir, yched, amateescu, effulgentsia, fago: Allow per-bundle overrides of field definitions.

Issue #1053648 by mdrummond, lokapujya, Cottser, Jeff Burnz, Les Lim, Gábor Hojtsy: Convert site elements (site name, slogan, site logo) into blocks.

Issue #2202611 by damiankloip, pwolanin: MTimeProtectedFastFileStorageTest runs with run-tests.sh, but MTimeProtectedFileStorageTest does not.

Issue #2053153 by tim.plunkett, dawehner, damiankloip, aspilicious: Allow contrib modules to provide plugins on behalf of optional modules.

Issue #2084421 by dawehner, pwolanin, YesCT, clemens.tolboom, Berdir, Xano, Sutharsan: Phase 2 - Decouple book module schema from menu links.

Issue #2199875 by andypost: No link to add view|form mode for entity types that have no shipped modes.

Revert "Issue #2201919 by damiankloip: Replace drupal_get_hash_salt() with direct Settings call in CsrfTokenGenerator."

This reverts commit aad87a80.

Issue #2201919 by damiankloip: Replace drupal_get_hash_salt() with direct Settings call in CsrfTokenGenerator.

Issue #2049209 by Cottser, dawehner, jibran, lokapujya, Manuel Garcia: Remove 'Theming information' feature from Views in favor of twig_debug.

Issue #2207219 by larowlan: Fatal: Call to a member function isSubclassOf() on a non-object in CommentManager.