Issue #2928994 by Berdir, alexpott, JeroenT, markcarver: Remove \Drupal\Core\Messenger\LegacyMessenger

Issue #3098489 by catch, lauriii, DamienMcKenna, zrpnr, longwave, bnjmnm: Remove deprecated jQuery UI library definitions

Issue #3020296 by alexpott, longwave, bradjones1, catch, Berdir, gapple: Remove Symfony's classloader as it does not exist in Symfony 4

Issue #3056539 by plach, DamienMcKenna, catch, hchonov, amateescu, tim.plunkett: Updating an entity type from non-revisionable to revisionable fails if it has non-revisionable fields stored in dedicated tables

Issue #3102724 by dww, tedbow, bnjmnm, webchick, ckrina, Gábor Hojtsy, xjm, benjifisher, AaronMcHale, lauriii, shaal, andrewmacpherson, rainbreaw, worldlinemine: Improve usability of core compatibility ranges on available updates report

Issue #3098475 by Berdir, catch, TravisCarden, xjm, benjifisher, alexpott, larowlan, dww: Add more strict checking of hook_update_last_removed() and better explanation

Issue #3017176 by finnsky, mogtofu33, alexpott, huzooka, dawehner: Support install profile and language code params in drupalInstall Nightwatch command

Issue #3116164 by Gábor Hojtsy: DeprecatedServicePropertyTrait should trigger deprecation for Drupal 10 in Drupal 9

Issue #3069696 by Berdir, andypost, dhirendra.mishra, longwave, alexpott: Remove BC layers from the entity system

Issue #3059950 by phenaproxima, Nebel54, seanB, alexpott: Media sources should handle empty source field values more gracefully

Issue #3108402 by lauriii, bnjmnm, FezVrasta, Wim Leers, mradcliffe, gisle: Update to Popper.js to 2.0.0

Issue #3098427 follow-up by amateescu, catch, alexpott: Manipulating the revision metadata keys before running the BC layer breaks the BC layer

Issue #3113020 by alexpott, longwave: Properly deprecate \Drupal\Core\Entity\EntityTypeInterface::isSubclassOf()

Issue #3099295 by DukeandGrace, ravi.shankar, Chi, mradcliffe: Always return exit code in Symfony console commands

Issue #3107617 by Hardik_Patel_12: t() calls should be avoided , use $this->t() instead in Workflow module

Issue #3105975 by Hardik_Patel_12: t() calls should be avoided in classes, use dependency injection and $this->t() instead in block module

Issue #3045171 by godotislate, rlmumford, bnjmnm, ccasals, bkosborne, johndevman, shimpy, Madhura BK, phjou, xaqrox, a3hill, tim.plunkett, gnuget, grahamC, kualee: Form blocks rendered inside layout builder break save

Issue #3105095 by mikeegoulding, Eric_A: ElementInfoManagerInterface::getInfoProperty() return type incorrect

Issue #2570985 by ifrik, chipway, lomasr, jhodgdon, shimpy, govind.maloo, vacho, Balu Ertl, Manjit.Singh, alexpott, Bojhan, volkswagenchick, mradcliffe, xjm, tkoleary, yoroy, no_angel, dawehner, webchick, Sam152, RuslanP, Gábor Hojtsy, wengerk, wla_g: Update the module descriptions on the Extend page

Issue #2946177 by ankitjain28may, bhanuprakashnani, mohit1604, Pasqualle, Rithesh BK, joachim, cilefen, ifrik: Incorrect help text

Issue #3108640 by godotislate, tim.plunkett: Entity reference field blocks not bubbling cache metadata when view access to referenced entity is not allowed

Issue #3099789 by amateescu, Berdir, hchonov, catch, alexpott: Remove the BC layer for revision metadata keys

Issue #3114116 by lauriii, andypost, Gábor Hojtsy: Re-schedule removal of deprecated JavaScript code to Drupal 10

Issue #3095922 by huzooka, Wim Leers, quietone, andypost: The comment "language" column in D7 might be empty after migrating from D6, this is invalid in D8

Issue #2858776 by catch, mikran, plach, jonathanshaw, johndevman, alexpott, dawehner, tstoeckler, Berdir: Make defining bundle-specific routes easier

Issue #3113292 by dww, tedbow, xjm, tim.plunkett: Update module has no tests for changes to status of the installed release (revoked, etc)

Issue #3072744 by twfahey, swatichouhan012, tim.plunkett: "Add a new inline block" title on settings tray doesn't match "Custom block"