Revert "Issue #1842140 by mdrummond, tonystar, gavin.hughes, killerpoke, lauriii, droweski, stevector, omg-its-maggie, jenlampton, Renee S: Remove title and wrapper div from theme_item_list."

This reverts commit 7939567609fd2513b486a906d71f5aa7a53ab5de.
Issue #2248297 by Berdir: Fixed Ensure routes are rebuilt when install modules.
Issue #2304403 by martin107, YesCT, Désiré: Convert language:weight into a protected property.
Issue #2350499 by stephr: Fixed Double message after content translations saved.
Issue #2229435 by lauriii, joelpittet, Rade: Clean up the way attributes are printed in field.html.twig.
Issue #2349879 by damiankloip: Fixed Remove unnecessary call to serializer > normalize in XmlEncoder::encode.
Issue #2347111 by znerol: StackKernelIntegrationTest is not testing a successful request.
Issue #2350505 by BarisW: Fixed Remove stray 'new' class on comments.
Issue #2175637 by Wim Leers: Touch support for the toolbar: greatly improves the UX of Toolbar on mobile devices.
Issue #2349365 by Cyberwolf: Fix typos in core.api.php
Issue #2350999 by mikebarkas, penyaskito: Fix typo in CommentTitleTest
Issue #2347711 by yched, undertext: Fixed FieldItemlListInterface::processDefaultValue($default_value) is expected to massage polymorphic data.
Issue #2350461 by mradcliffe, chx, David_Rothstein: Fixed issues with UpdateComplexTest in PostgreSQL driver.
Issue #2225349 by ckrina, G.I.Joe, lauriii, mErilainen: Responsive styles for Modal dialog.
Issue #2249995 by mgifford, Lukas von Blarer: Clean up hover/focus - In Seven.
Issue #2337825 by YesCT, martin107, mon_franco: Update comment references to the interface for ConfigurableLanguage class due to the ConfigurableLanguageInterface (followup).
Issue #1922966 by jibran, damiankloip: Remove 'bool' and 'translatable' key from option definitions.
Issue #2345879 by marcvangend: Added Enhance ThirdPartySettingsTrait with a get-all-settings method.
Issue #2349789 by markus_g: Fixed Responsive Image Mappings are not listed with sqlite.
Issue #2270251 by yvesvanlaer | Bojhan: Unwanted box around CKEditor, i.e. our CSS overrides no longer work (presumably since CKEditor 4.4 upgrade).