Issue #2335659 by tim.plunkett, dawehner, effulgentsia, sun: Remove FormState ArrayAccess usage from core.

Issue #2273277 by Wim Leers, effulgentsia, Fabianx: Fixed Figure out a solution for the problematic interaction between the render system and the theme system when using #pre_render.

Issue #2299421 by amitgoyal, joshi.rohit100: Remove all usage of drupal_build_form() as deprecated and replaced by FormBuilderInterface::buildForm().

Issue #2102489 by webwarrior, InternetDevels: Remove drupal_set_title in views module controllers (last instance of drupal_set_title()).

Issue #1851414 by nod_, quicksketch, frega, dawehner, damiankloip: Convert Views to use the abstracted dialog modal.

Issue #1979038 by dawehner, effulgentsia, tstoeckler: Convert views_ajax_autocomplete_taxonomy() to a Controller.

Issue #1987066 by Kevin Morse, JohnAlbin, rteijeiro, echoz, ry5n: Rename files to match CSS file naming convention.

Issue #1892836 by dawehner, alexpott: Use user/autocomplete instead of views own autocomplete function.

Issue #1876942 by damiankloip, dawehner, tim.plunkett: Use direct methods instead of arrayAccess for display handlers.

Issue #1831324 by sun, effulgentsia: Form API #autocomplete_path() JS and callbacks to use GET q= parameter instead of menu tail.

Issue #1748176 by dawehner, fastangel, amateescu, damiankloip: Add test coverage for Views user integration.