Issue #2926412 by Wim Leers: Follow-up for #2883680: deprecation message indicates the wrong deprecation introduction version

Issue #2938170 by navneet0693, andrewmacpherson, markconroy, owenpm3, larowlan: Enable ALT text for Banner Block image field

Issue #2938947 by Wim Leers, plach: Always list a "Current revision" for each available content translation

Issue #2939107 by plach, Wim Leers: Follow-up for #2924724: Clean up the node revision translation revert logic to leverage the new API

Issue #2208429 by dawehner, almaudoh, alexpott, jibran, Xano, donquixote, amitgoyal, bircher, stefan.r, Mile23, alvar0hurtad0, Berdir, andypost, larowlan: Extension System, Part III: ExtensionList, ModuleExtensionList and ProfileExtensionList

Issue #2938918 by David_Rothstein, markconroy, larowlan: Impossible to switch back to the Umami theme after switching away from it

Issue #2931765 by timmillwood, Wim Leers: Regression: \Drupal\hal\LinkManager\LinkManagerBase implicitly depends on REST module

Issue #1014816 by mondrake, Dave Reid, m1n0, leschekfm, jwilson3, claudiu.cristea, fietserwin, guybedford: Allow image fields to use any extensions the current image toolkit supports (instead of hard-coding jpg, png and gif only)

Issue #2938895 by plach, Wim Leers, hchonov, timmillwood: Make EntityConverter load the latest translation-affecting revision for translated entities

Issue #2936725 by gabesullice, Wim Leers, dawehner, Berdir: EntityDataDefinition::create() does not respect derived entity definitions

Issue #2936253 by gabesullice: Clarify usage of AccountProxyInterface: recommend AccountInterface for most use cases

Issue #2920536 by Wim Leers, Grayside: Force all serializer encoders + normalizers services to be private

Issue #2935137 by el7cosmos, Mixologic: License "GPL-2.0+" is a deprecated SPDX license identifier, use "GPL-2.0+-only" or "GPL-2.0+-or-later" instead

Issue #2938187 by markconroy, andrewmacpherson: Homepage/Recipes page banner image is duplicating on small screens

Issue #2872355 by sarguna raj M, chiranjeeb2410, joachim: expand and clarify docs for DefaultPluginManager::alterInfo()

Issue #2938369 by Mohit Malik, yo30, mondrake, alexpott: The Symfony\Component\ClassLoader\WinCacheClassLoader class is deprecated

Issue #2921706 by Daniel Korte, bkosborne: Update example.settings.local.php to include ['cache']['bins']['page']

Issue #2914834 by snehi, tresti88, joachim: missing @return for drupal_get_user_timezone() and return types for other methods in bootstrap.inc

Issue #2935254 by kim.pepper: Remove all usages of drupal_get_message and drupal_set_message in core includes

Issue #2937636 by piyuesh23, markconroy: Umami Theme - follow-up - Use hook_form_alter() for search block placeholder

Issue #2930542 by sahil432, sdewitt, andrewmacpherson: Disabled form labels in Seven theme's node meta-data  do not meet WCAG AA 1.4.3 Contrast (minimum)

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

Issue #2919373 by tedbow, Wim Leers, Adita, webchick, Berdir, drpal, xjm, samuel.mortenson, bircher: Prevent Settings Tray functionality for blocks that have configuration overrides

Issue #2937889 by larowlan, Sam152: Regression: LinkWidget no longer supports base fields with optional title

(cherry picked from commit 7871cc00)

Issue #2809635 by markconroy, navneet0693, alexpott, smaz, larowlan, Eli-T, webchick, yoroy, ikit-claw, budda, kjay, timmillwood, tkoleary, Gábor Hojtsy, andrewmacpherson, lauriii, JayKandari, jibran, ok_lyndsey, big_man, ckrina, nathancz, Paul_Gregory, vijaycs85, SharJay, tomphippen, tim.plunkett, Tarun Lewis, cehfisher, kreynen, Petr Illek, mariohernandez, thamas, thatdamnqa, John Cook, philipnorton42, h2cm, kattekrab, martin_q, waako: Create experimental installation profile

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