Issue #2936161 by Yogesh Pawar, idebr, alexpott: status-messages.html.twig documentation refers to non-existing variable 'display'

Issue #2880703 by alexpott, droplet, Daniel.Moberly, yogesh01: Status report page without JavaScript is messed up

Issue #2923305 by Saviktor, tstoeckler, MaskOta: Module (un-)install tables have a useless "data-striping" attribute

Issue #2784443 by tedbow, Wim Leers, Cottser, tim.plunkett, droplet, drpal, nod_, lauriii: Move off-canvas functionality from Settings tray module into drupal.dialog.ajax library so that other modules can use it

Issue #2887860 by drumm, Cottser: Allow attributes to be passed to admin blocks (admin_block theme hook)

Issue #1918994 by Tim Bozeman, mgifford, mpdonadio, vprocessor, sun, xjm, falcon03, nabiyllin, rteijeiro, cwarsaw, yoroy, andymartha, jessebeach, lauriii, jhedstrom, andypost, Bojhan, cilefen, aaronbauman, sugaroverflow: Improve Datetime and Daterange Widget accessibility

Revert "Issue #2784311 by Jmdrawneek@googlemail.com, mgifford, andrewmacpherson, xjm, Cottser, tim.plunkett, dman, DomoSapiens: Skip to main content should link to main tag or similar"

This reverts commit ed82b95e.

Issue #2784311 by Jmdrawneek@googlemail.com, mgifford, andrewmacpherson, xjm, Cottser, tim.plunkett, dman, DomoSapiens: Skip to main content should link to main tag or similar

Issue #665790 by chrisrockwell, Sumit kumar, lauriii, joelpittet, sun, vulcanr, vaplas, yoroy, leahtard, tompagabor, aspilicious, ckrina, Gábor Hojtsy, David_Rothstein, Manuel Garcia, rootwork, nod_, kostyashupenko, pguillard, Bojhan, droplet, typhonius, wturrell, mgifford, webkenny, cosmicdreams, tkoleary, YesCT, marcvangend, markabur, LewisNyman, mrfelton, oriol_e9g, prabhu9484, catch, hedrickbt, tsvenson, longwave, dww, kika, borisson_, rdellis87, realityloop, klonos: Redesign the status report page

Issue #2708255 by dawehner, yoroy, swentel, Jacine, Gábor Hojtsy: Add support for #required on #type => details

Issue #1390580 by mohit_aghera, heliogabal, Chernous_dn, andrewmacpherson, mgifford, droplet, Everett Zufelt: Add comments for skip link and main-content anchor in templates

Issue #2723961 by jo.st, rajeshwari10, andrewmacpherson: Broken aria-labelledby ID reference in menu block and breadcrumb templates

Issue #2546248 by scythian, XaviP, darrenwh, mikebell_, ingaro, urbanlegend, jhodgdon, davidhernandez, andypost, joelpittet, emma.maria, cdykstra, Cottser, LewisNyman, joachim: Use consistent style to mention HTML tags in code comments

Issue #2666792 by bojanz, dawehner, edysmp, heddn: Provide a route provider for add-page of entities

Issue #2528420 by cane989, andrewmacpherson, malavya, mgifford, Shabbir, Denchev, Cottser: Two H1's in Installation Process

Issue #2402165 by joelpittet, hass, madhavvyas: #theme => 'links' renders <li class="_"> when the #links array is not associative

Issue #2603818 by jhodgdon, beejeebus, blackra: Add defgroups for listing page headers for api.drupal.org

Issue #2587685 by Antti J. Salminen, lauriii, jaakko, AjitS, Sagar Ramgade, rang501: Remove references to non existing preprocess functions

Issue #2575737 by Cottser, davidhernandez: Copy templates, CSS, and related assets to Stable and override core libraries' CSS

Issue #2547691 by snehi, er.pushpinderrana, edxxu, ipun.amin, visabhishek, jhodgdon, cilefen, ttkaminski: Typo with #theme_wrappers

Issue #2151113 by akalata, joelpittet, mdrummond, mfernea, martin107, mr.baileys, Cottser: Convert theme_system_modules_uninstall() to Twig

Issue #2151109 by akalata, Cottser, joelpittet, jcnventura, lauriii, derheap: Convert theme_system_modules_details() to Twig

Issue #2560049 by hass, chrisfree, cilefen, Wim Leers, Gábor Hojtsy: Incorrect capitalisation of translatable strings

Issue #2557367 by davidhernandez, joelpittet, madhavvyas, alexpott, nikkyR, Studiographene, emma.maria, xjm: Fix inline list CSS

Issue #2568099 by Wim Leers, mdrummond, mortendk: Follow-up for #2407739: Remove the js-quickedit-main-content class that was added in favor of relying on <main>

Issue #2273671 by JeroenT, mgifford, Tim Bozeman, StryKaizer, catch: Allowed number of values more than 1 needs aria-describedby Support

Issue #2471739 by RajeevK, martins.kajins, pektinasen, LewisNyman, jaxxed: Convert reusable layout classes to BEM standards

Issue #2547159 by mdrummond, mortendk, davidhernandez, lauriii, joelpittet, Wim Leers, Cottser: menu class generating should be in the template not in a function

Issue #2476947 by mdrummond, Wim Leers, davidhernandez, lauriii, joelpittet, andypost, Cottser, JeroenT, Manuel Garcia, rpayanm: Convert "title" page element into a block

Revert "Issue #2471739 by RajeevK, martins.kajins, LewisNyman, jaxxed: Convert reusable layout classes to BEM standards"

This reverts commit cec8f5eb.

Issue #2471739 by RajeevK, martins.kajins, LewisNyman, jaxxed: Convert reusable layout classes to BEM standards

Issue #2405057 by nlisgo, Manjit.Singh, ctraltdel, madhavvyas, avitslv, LewisNyman, emma.maria, joelpittet, dernetzjaeger, wmortada, karolus, cilefen, Noe_, davidhernandez, idebr: Replace arrow-asc and arrow-desc images with Libricons and implement using CSS