Issue #2124377 by ellishettinga, Jelle_S, attiks, mdrummond, Schnitzel, InternetDevels: Rename "Picture" module to "Responsive Image" module.

Issue #1996238 by sun, nod_, damiankloip, Wim Leers, longwave, alexpott, Xano, mdrummond, Mark Carver, Jeff Burnz, highrockmedia, joelpittet, et al: Replace hook_library_info() by *.libraries.yml file.

Issue #2033415 by tankerjoe, lostkangaroo, batigolix, sandipmkhairnar, m1n0: Fix up hook_help for picture module

Issue #2047633 by pwolanin, dawehner, kim.pepper, Xano, amateescu, tim.plunkett: Move definition of menu links to hook_menu_link_defaults(), decouple key name from path, and make 'parent' explicit.

Revert "Issue #2047633 by dawehner, pwolanin, Xano, amateescu, tim.plunkett: Move definition of menu links to hook_menu_link_defaults(), decouple key name from path, and make 'parent' explicit."

This reverts commit 531fd593.

Issue #2042773 by yched, Berdir, pcambra: Change #items within a theme_field() render array from an *array* to the same $items *object* used throughout the rest of the formatter pipeline.

Issue #2047633 by dawehner, pwolanin, Xano, amateescu, tim.plunkett: Move definition of menu links to hook_menu_link_defaults(), decouple key name from path, and make 'parent' explicit.

Issue #2085907 by YesCT, Gábor Hojtsy: Ensure all configuration entities have an Edit/Configure tab by default.

Issue #1834002 by Gábor Hojtsy: Fixed Delete operations are all over the place. Remove tabs, provide title in routing.

Issue #1981368 by tim.plunkett, Crell, webchick: Convert all routes to 'module_name().foo_bar()' naming convention.

Issue #1847002 by tim.plunkett, effulgentsia, msonnabaum: Move entity type classes from Drupal$provider\Plugin\Core\Entity to Drupal$provider\Entity.

Issue #2009662 by jlbellido, pplantinga, InternetDevels, pwieck, jenlampton: Replace theme() with drupal_render() in picture module.

Issue #1983844 by tim.plunkett, dawehner: Add EntityListController and convert picture.module callbacks to routes/controllers to provide a use-case.

Issue #1946450 by ayelet_Cr: Convert confirm_form() in picture_mapping.admin.inc to the new form interface.