Issue #1935000 by Gábor Hojtsy, vijaycs85: Fixed Some configuration entities are created as in language unknown.

Issue #1928056 by pwolanin: Queue system createItem() should return ID, and  properties should be documented.

Issue #1070166 by mgifford: As a screen-reader user I need a way to recognize the purpose of the Next and Previous links in the Views mini pager.

Issue #1931602 by damiankloip, dawehner: ViewExecutable::setDisplay() will never return an invalid display ID.

Issue #1924528 by JohnAlbin: Fixed Remove aggregator.theme.css deprecated by entity conversion #293318.

Issue #1623574 by droplet, thund3rbox, sun, stevecowie: Remove trailing space from form element labels and field labels (HTML nbsp).

Issue #1891980 by Berdir, amateescu: Add Service termination API to reliable terminate/shut down services in the container.

Issue #1821420 by vijaycs85, cam8001, Albert Volkman, ACF, typhonius, pcambra, Berdir: Convert mail variables to cmi.

Issue #1919910 by larowlan: Refactor custom_block() upgrade path to create tables using hook_schema_0() instead of in block_update_N().

Issue #1915774 by tim.plunkett, amateescu, Crell, dawehner: Decide whether core route controllers should generally/always be DIC services or not.

Issue #1934788 by sun: 'Administration role' setting in User Account settings form defaults to first, randomly available user role.

Issue #1849752 by effulgentsia, Berdir, jibran, neclimdul: Abstract non-Drupal-specific parts of AnnotatedClassDiscovery into a Drupal\Component base class.

Issue #1049050 by mfb, TwoD, David_Rothstein, jpsoto: Fixed file_stream_wrapper_uri_normalize(): remove dead code.

Issue #1929136 by Gábor Hojtsy, alexpott, YesCT: Fixed override-free context, move global config overrides back to an event listener.

Issue #788114 by quicksketch, David_Rothstein, sun, Wim Leers: Unprivileged users should only get one text format by default.

Issue #1893108 follow-up by Berdir, dawehner: Rename EntityUnitBaseTest => EntityUnitTestBase to conform to coding standards.

Issue #1591806 by tim.plunkett, ryanissamson, jenlampton, Risse, psynaptic, Gábor Hojtsy, kmcculloch, pakmanlh, Rob Loach: Change block 'subject' so that it's called (admin_)label like everything else on the theme layer.