Issue #2878556 by plach, matsbla, vijaycs85, Gábor Hojtsy, catch, gabesullice, effulgentsia, hchonov, hass, amateescu, xjm: Ensure that changes to untranslatable fields affect only one translation in pending revisions

(cherry picked from commit 27c3b40e)

Issue #2891215 by plach, timmillwood, hchonov, amateescu, catch, gabesullice: Add a way to track whether a revision was default when originally created

(cherry picked from commit 49c6761b)

Issue #2927746 by alexpott, catch, slasher13, mpdonadio, martin107, RoSk0, jibran, larowlan, pounard, Mile23, Jo Fitzgerald, deviantintegral, pritish.kumar: Update Symfony components to 3.4.*

(cherry picked from commit 47c2dda6)

Revert "Issue #2891215 by plach, timmillwood, hchonov, amateescu, catch, gabesullice: Add a way to track whether a revision was default when originally created"

This reverts commit 9182b216.

Issue #2908952 by sahil432, martin107: drupal_get_complete_schema() and drupal_get_schema() are not completely removed

(cherry picked from commit c79d74ab)

Issue #2936793 by tim.plunkett, tstoeckler, EclipseGc: EntityReferenceItem::generateSampleValue() should create a sample entity if a referenceable entity is not found

(cherry picked from commit f724db34)

Issue #2858482 by Wim Leers, dawehner, benjy, larowlan, tedbow, borisson_: Simplify REST routing: disallow requesting POST/PATCH in any format, make consistent

(cherry picked from commit b4a02309)

Issue #2885469 by Wim Leers, amateescu, timmillwood, alexpott, tstoeckler, xjm, remram, Berdir, dawehner, larowlan, samuel.mortenson: Regression: manually setting the ID field for newly-created content entities is not possible anymore (public follow-up to SA-2017-002)

(cherry picked from commit 4fbf9977)

Issue #2891215 by plach, timmillwood, hchonov, amateescu, catch, gabesullice: Add a way to track whether a revision was default when originally created

(cherry picked from commit 49c6761b)

Issue #2924724 by plach, hchonov, timmillwood, Gábor Hojtsy, amateescu, gabesullice, catch: Add an API to create a new revision correctly handling multilingual pending revisions

Issue #2923004 by tedbow, bircher, samuel.mortenson, alexpott, Wim Leers, axel.rutz, Berdir, borisson_, xjm, tim.plunkett: Add method to check if any overrides are applied to \Drupal\Core\Config\Config

Issue #2904084 by Ruslan P, Venkatesh Rajan.J: Confusing title for "Boolean" field in "Manage form display"

Issue #2916740 by chr.fritsch, xjm, Manuel Garcia, tstoeckler, alexpott, seanB, Sam152, amateescu, tim.plunkett, dawehner, larowlan, Berdir: Add generic entity actions

Issue #2933964 by kiamlaluno, oakulm: Remove the left-over @todo comments in the BaseFieldDefinition class

Issue #2671964 by EclipseGc, tim.plunkett, Jo Fitzgerald, larowlan, fago, dawehner, Berdir, phenaproxima: ContextHandler cannot validate constraints

Issue #2861840 by tim.plunkett, lauriii: Preprocess functions are not merged when a module registers a theme hook for a theme-provided template

Issue #2931047 by Dropa, D34dMan, borisson_, catch: hook_post_update_NAME documentation is misleading

Issue #2934152 by Wim Leers, neclimdul: ContentTypeHeaderMatcher should not run for GET, HEAD, OPTIONS or TRACE requests

Issue #2933424 by David_Rothstein, harsha012, jhodgdon, vaplas: English-specific links to php.net shouldn't be used in non-translatable strings

Issue #2926309 by vaplas, alexpott, mpdonadio, tacituseu, Mixologic: Random fail due to APCu not being able to allocate memory

Issue #2928699 by marcoscano, phenaproxima, amateescu, seanB, yoroy: Add an alter hook for the pre-configured field UI options and implement it in the Media module

Issue #2932774 by harsha012, gaurav.kapoor, neelam.chaudhary, dpi: Update docs for getEmail, can return null

Issue #2932865 by kiamlaluno, joachim: Incorrect description for ExtensionDiscovery::scanDirectory()

Issue #2930715 by alexpott, dawehner: Recursive rebuild caused by installing admin_toolbar_tools module

Issue #2926483 by plach, amateescu, effulgentsia, xjm, Sam152, timmillwood, jibran, larowlan, Gábor Hojtsy: Add API methods for determining whether an entity object is the latest (translation-affecting) revision

Issue #2837022 by hchonov, xjm, vlad.dancer, plach, matsbla, Gábor Hojtsy: Concurrently editing two translations of a node may result in data loss for non-translatable fields

Issue #2346893 by lauriii, idebr, slashrsm, RavindraSingh, Rade, Fabianx, alexpott, swentel, gauravjeet, darrenwh, deepak_zyxware, joelpittet, Wim Leers, Yogesh Pawar, Vj, ivan.chavarro, josephdpurcell, josmera01, rloos289, kattekrab, Tanvish Jha, csakiistvan, xjm, larowlan, akalata: Duplicate AJAX wrapper around a file field

Issue #2923015 by cburschka, amateescu, tstoeckler, alexpott, hchonov, mondrake, pfrenssen: [PHP 7.2] Incompatible method declarations

Issue #2927806 by alexpott, mondrake, jibran, Mile23: Use PHPUnit 6 for testing when PHP version >= 7.2