Issue #3091418 by Manuel Garcia, jibran, tedbow, TravisCarden, xjm, greg.1.anderson, Gábor Hojtsy, catch, Mile23, Berdir, hussainweb: Update composer dependencies on 9.0.x

Issue #3095713 by bnjmnm, Meenakshi.g, lauriii, xjm, dww: Create classy directory with README, in the templates and css directories for all themes subtheming Classy

Issue #2936105 by SerShevchyk, voleger, RoSk0, Charlie ChX Negyesi: Deprecate DRUPAL_PHP_FUNCTION_PATTERN and replace its usages

Issue #3067762 by alexpott, Berdir, Wim Leers: Fix bug in \Drupal\rest\RequestHandler::createArgumentResolver and handle "Passing in arguments the legacy way is deprecated" deprecation

Issue #3102899 by mondrake: ViewExecutableTest uses a mocked argument callback wrongly (and fails in PHPUnit8)

Issue #3097327 by Wim Leers, quietone, Meenakshi.g: d7_node_title_label migration plugin incorrectly generating base_field_override for every node type, even those that don't have an overridden title label

Issue #2946889 by Wim Leers, jfussion, quietone, jofitz, heddn: Missing migration filters that are replaced with filter_null may have invalid settings applied

Issue #3096969 by quietone, gabesullice, Wim Leers, mikelutz: migrate_drupal's Variable source plugin always returns a row for processing, even if none of the variables for a migration are set on the source site

Issue #3095195 by jofitz, Wim Leers, heddn: Drupal 7 date fields configured to not collect the hour/minute/second granularities can have "00" MM or DD attributes

Issue #3095146 by Wim Leers, heddn: Drupal 7 date fields configured to not collect the hour/minute/second granularities can have a different "settings" structure than the migration assumes

Issue #3100496 by amateescu, Donnyboypony, alexpott, Berdir, daffie, PapaGrande: Workspaces should only alter non-deprecated path_alias services

Issue #3100066 by oknate, Wim Leers, alisonjo315: "Convert line breaks into HTML" filter should exclude <drupal-media> tag

Issue #3101621 by Gnanagowthaman sankar, Meenakshi.g, daffie, timmillwood, Krzysztof Domański: Remove timmillwood from MAINTAINERS.txt

SA-CORE-2019-012 by samuel.mortenson, larowlan, pwolanin, Sam152, Jasu_M, David_Rothstein, michieltcs, Ayesh, alexpott, xjm, vijaycs85, mcdruid

(cherry picked from commit abeecf78)

(cherry picked from commit 63efacbb)

SA-CORE-2019-009 by mcdruid, larowlan, Heine, alexpott, xjm, DamienMcKenna, dsnopek, catch, greggles

(cherry picked from commit 7ae15f9c)

Issue #3099986 by alexpott, amateescu: Move part of workspaces_post_update_move_association_data() to a hook_update_N

Issue #2882031 by Lendude, acbramley, RobLoach: Undefined index: identifier in view's DisplayPluginBase->isIdentifierUnique()

Issue #3098150 by bnjmnm, longwave: Add test coverage to ensure Classy templates that have identical versions in Stable are kept in sync

Issue #3092714 by alexpott, hchonov, Berdir, gease: Config entity updater misbehaves when updating multiple entity types

Issue #2930283 by Krzysztof Domański, geek.merlin aka axel.rutz, hiten2112, dagmar, plach, alexpott, dawehner: Error backtrace malformatted

Issue #3087061 by quietone, larowlan, Lendude: Move existing assertions of IdConflict page to new test files

Issue #3018148 by Lendude, tstoeckler: Views bulk forms perform redirects to the confirmation page even if it is not allowed for the user

Issue #3096811 by gease, Meenakshi.g, hchonov: Reusing initialized constraint validators overwrittes validation errors

Issue #3082340 by mondrake, longwave, alexpott, Krzysztof Domański: Replace assertEquals() overrides in PHPUnit Kernel, Functional and FunctionalJavascript tests with a MarkupInterfaceComparator implementation

Issue #3043467 by AaronMcHale, mgbauman, bkosborne, lauriii: Multi-select list items "escape" bounding box in Off-Canvas Forms when using WebKit and Mozilla based browsers

Issue #3089523 by benjifisher, jhodgdon: Use progressive disclosure to hide Sort options on entity reference fields until bundles are selected