Revert "Issue #3370946 by kunal.sachdev, lauriii, tim.plunkett, omkar.podey, alexpott, ckrina, smustgrave, larowlan, rkoller, hooroomoo, duadua: Page title should contextualize the local navigation"

This reverts commit ad606a8f.

Issue #3370946 by kunal.sachdev, lauriii, tim.plunkett, omkar.podey, alexpott, ckrina, smustgrave, larowlan, rkoller, hooroomoo, duadua: Page title should contextualize the local navigation

Issue #3414165 by quietone, shalini_jha, adwivedi008, longwave: Use "install" not "enable" for modules in strings

Issue #3252386 by alexpott, longwave, duadua, mondrake, mstrelan, andypost, Spokje, VladimirAus, catch, effulgentsia, Berdir, xjm, bircher, joachim, larowlan: Use PHP attributes instead of doctrine annotations

Issue #1643386 by Grevil, Anybody, vasike, lauriii, Spokje, nod_, bnjmnm, Pancho, tim.plunkett, longwave: Strip useless "_" at beginning and end of JS-transliterated machine names

Revert "Issue #1643386 by Grevil, Anybody, vasike, Spokje, lauriii, nod_, bnjmnm, Pancho: Strip useless "_" at beginning and end of JS-transliterated machine names"

This reverts commit 9337e4f6.

Issue #1643386 by Grevil, Anybody, vasike, Spokje, lauriii, nod_, bnjmnm, Pancho: Strip useless "_" at beginning and end of JS-transliterated machine names

Issue #3027653 by clayfreeman, tim.plunkett, Pavel Ruban, raman.b, ankithashetty, cboyden, larowlan, mpotter, phenaproxima: Allow block and layout plugins to determine if they are being previewed

Issue #2852557 by bircher, alexpott, longwave, nedjo, dww: Config export key order is not predictable, use config schema to order keys for maps

Issue #3160629 by raman.b, tim.plunkett, Berdir: BlockPluginTrait cannot call ::addContextAssignmentElement() itself

Revert "Issue #3199730 by mohit_aghera, Abhijith S, AJV009, Gauravmahlawat, shriaas2898, pameeela, roman-yrv, ranjith_kumar_k_u, Kumar Ashutosh, ilgnerfagundes: Views block description is double-escaped if display name is set"

This reverts commit fd9f7081.

Issue #3199730 by mohit_aghera, Abhijith S, AJV009, Gauravmahlawat, shriaas2898, pameeela, roman-yrv, ranjith_kumar_k_u, Kumar Ashutosh, ilgnerfagundes: Views block description is double-escaped if display name is set

Issue #2918149 by harpreet16, tim.plunkett, raman.b, anil.gangwal, dalin, grndlvl, nikunjkotecha, kalyansamanta, paulocs, ranjith_kumar_k_u, froboy: "This block is broken or missing..." should only be shown to users that have access to do something about it

Issue #2273381 by clayfreeman, tim.plunkett, andypost, dawehner, EclipseGc, jungle, xjm, alexpott, Berdir: Convert ContextAwarePluginBase to traits

Issue #3091309 by tim.plunkett, godotislate, paulocs, thursday_bw, alexpott, TwiiK: Broken context-aware block plugins throw an unexpected exception

Issue #3081145 by Berdir, andypost, longwave, catch, tim.plunkett, larowlan: Remove BC layers in the Plugin component

Revert "Issue #2852463 by mikelutz, tim.plunkett, heddn, xjm, MegaChriz, joachim, phenaproxima, dawehner, benjifisher: Create a trait to implement \Drupal\Component\Plugin\ConfigurableInterface"

This reverts commit 109dfd58.

Issue #2852463 by mikelutz, tim.plunkett, heddn, xjm, MegaChriz, joachim, phenaproxima, dawehner, benjifisher: Create a trait to implement \Drupal\Component\Plugin\ConfigurableInterface

Issue #2959493 by bnjmnm, phenaproxima, tim.plunkett, tedbow, Adrian83, lauriii, xjm, andrewmacpherson, johndevman, KarenS, alwaysworking, jrockowitz, ckrina, cboyden, webchick, seanB, benjifisher, larowlan: Allow Layout Builder live previews to be toggled to allow easier drag-and-drop

(cherry picked from commit d028385c)

Issue #2946122 by mikelutz, heddn, tim.plunkett, phenaproxima, alexpott, joelpittet, MegaChriz, joachim, xjm: Deprecate ConfigurablePluginInterface and replace with an interface that doesn't extend DependentPluginInterface

Revert "Issue #2946122 by mikelutz, heddn, tim.plunkett, phenaproxima, alexpott, MegaChriz, joachim: Deprecate ConfigurablePluginInterface and replace with an interface that doesn't extend DependentPluginInterface"

This reverts commit b1f49624.

Issue #2946122 by mikelutz, heddn, tim.plunkett, phenaproxima, alexpott, MegaChriz, joachim: Deprecate ConfigurablePluginInterface and replace with an interface that doesn't extend DependentPluginInterface

Issue #3014949 by tim.plunkett: Deprecate 'context' on Block and Condition plugin annotations in favor of 'context_definitions'

Issue #2992410 by tim.plunkett, scottsawyer, sugaroverflow, phenaproxima: Provide placeholders for empty blocks (for example, an empty Views listing)

Issue #2966969 by tim.plunkett, msankhala, alexpott: Trigger a warning whenever the "Broken" block plugin is instantiated

Issue #2572613 by Malevi4, idebr, pfrenssen, Mile23, RajeevK: Fix 'Drupal.Array.Array.CommaLastItem' coding standard

Issue #2849669 by alexpott, pwolanin, Munavijayalakshmi, dawehner: Fix \Drupal\Component\Utility\Unicode() because of the Symfony mbstring polyfill

Issue #2935255 by Jo Fitzgerald, kim.pepper, voleger, alexpott, martin107, jibran, catch: Remove all usages of drupal_get_message and drupal_set_message in core lib

Issue #2949177 by tim.plunkett, samuel.mortenson, mark_fullmer, tedbow, EclipseGc, andypost: Introduce a service that returns filtered plugin definitions

Issue #2572791 by Mile23, andriyun, attiks, RoSk0: Fix 'Drupal.WhiteSpace.OpenBracketSpacing' coding standard

Issue #2884769 by tim.plunkett, larowlan, tedbow: \Drupal\Core\Block\BlockManager::getGroupedDefinitions() triggers a notice on every call

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Issue #2803779 by pfrenssen, klausi, Mile23, alexpott, dawehner: Update Coder to 8.2.10 and fix errors from improved sniffs