Issue #2935256 by Jo Fitzgerald, voleger, kim.pepper, ibustos, Yogesh Pawar, catch, jibran: Remove all usages of drupal_get_message and drupal_set_message in modules

Issue #2873696 by nvexler, wengerk, gido, Jo Fitzgerald, xjm: Add @internal to core classes, methods, properties to Form Classes

Issue #2654150 by mondrake, cilefen, pritish.kumar: Image effects in ImageStyleEditForm dropdown should be sorted by label

Issue #2704871 by pepegarciag, Mile23, Manuel Garcia, ieguskiza, snehi, gaurav.pahuja, dimaro, rajeshwari10, gargsuchi, pashupathi nath gajawada, penyaskito, xjm, ZeiP, Wim Leers, alexpott: Replace usages of deprecated method drupal_render()

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

Revert "Issue #2704871 by pepegarciag, ieguskiza, snehi, gaurav.pahuja, rajeshwari10, dimaro, gargsuchi, pashupathi nath gajawada, penyaskito, Manuel Garcia, Mile23: Replace usages of deprecated method drupal render()"

This reverts commit ae3ee317.

Issue #2704871 by pepegarciag, ieguskiza, snehi, gaurav.pahuja, rajeshwari10, dimaro, gargsuchi, pashupathi nath gajawada, penyaskito, Manuel Garcia, Mile23: Replace usages of deprecated method drupal render()

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2559605 by Cottser, stefan.r: Convert SafeMarkup::checkPlain() in render arrays to #plain_text

Issue #2457887 by prateekMehta, stefan.r, rpayanm, alexpott: Use Utility\SafeMarkup class instead of Utility\String for placeholder(), checkPlain(),format() functions

Issue #2378095 by Wim Leers, Devin Carlson: Convert all remaining attached individual CSS/JS assets to attached asset libraries

Issue #2339151 by EclipseGc, tim.plunkett, Gábor Hojtsy, effulgentsia: Conditions / context system does not allow for multiple configurable contexts, eg. language types

Issue #2347465 by tim.plunkett, dawehner, cilefen: Convert all instances of #type link/links to convert to use routes.

Issue #2022875 by Berdir, alexpott, Xano, swentel, tim.plunkett, vladan.me: Resolve difference between submitForm(), submit(), and save() in EntityFormController.

Issue #1938910 by JeroenT, Temoor, gnuget, pratik60, dsnopek, Brandonian | duellj: Convert image theme tables to table #type.

Issue #2308821 by tim.plunkett: Replace FormErrorInterface with $form_state->setErrorByName() and $form_state->setError().

Issue #2251223 by tim.plunkett: ConfigurableImageEffectInterface should use ConfigurablePluginInterface and PluginFormInterface.

Issue #2002246 by tompagabor, floretan, lauriii, pakmanlh, rbomhof | pixelite: Capitalize operations links in the comment and taxonomy term admin UI.

Issue #2095195 by yched, fago, Berdir, amateescu, swentel, pfrenssen, Xano: Remove deprecated field_attach_form_*().

Issue #2195753 by tim.plunkett: Changes to config entities that use plugins are not propagated to the plugins.

Issue #2145007 by tim.plunkett, h3rj4n: Convert form_set_error() in FormBase classes to use FormErrorInterface.

Issue #2052787 by andypost, tim.plunkett, slashrsm: Image style effect ordering exhibits some odd behaviour.

Issue #2102459 by alexpott, vijaycs85, InternetDevels: Remove drupal_set_title() in Image module controllers.

Issue #2057869 by dawehner, jibran: Provide an alias for 'plugin.manager.entity' called 'entity.manager'.

Issue #1788542 by claudiu.cristea, andypost, tim-e, fubhy, speely, heyrocker: Use EntityFormController and EntityListController for image styles.