Issue #3336780 by diegors, schlaukopf, xjm, fabiansierra5191: Correctly capitalize "url" in documentation only, part 2

Issue #3174422 by komalk, munish.kumar, awangsetyawan: Toolbar menu inaccessible when javascript disabled

Issue #3041076 by alexpott, shaal, Gábor Hojtsy, lauriii, Wim Leers, catch, Cottser, jibran, andypost, znerol, xim, joelpittet, effulgentsia: Update Drupal 9 to Twig 2

Issue #3053129 by R.shaikh, idebr: Links to twig.sensiolabs.org are redirects: replace with its destination URLs 1.x version

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

Issue #2173527 by idflood, scresante, rpayanm, mgifford, Sam152, Wim Leers: The Menu-Toolbar area should be refactored so that Tray items are nested in the same container as their associated parent Toolbar item

Issue #1800614 by falcon03, mgifford, LinL | jessebeach: Improve the responsive toolbar accessibility.

Issue #1898464 by jenlampton, Cottser, joelpittet, steveoliver, Dustin Currie, shanethehat, cafuego, mr.baileys, adnen: toolbar.module - Convert theme_ functions to Twig.

Issue #1847198 by benjifisher, jessebeach, effulgentsia: Update the structure returned by hook_toolbar().

Issue #1137920 by jessebeach, lewisnyman, tkoleary, Bojhan, webchick, benjifisher, nod_, sjbassett, kathryn531, effulgentsia, Everett Zufelt: fixed toolbar on small screen sizes and redesign toolbar for desktop.

Issue #1760530 by jenlampton, Albert Volkman, crazyrohila, Risse, justafish, Fabianx: Move all template files provided by core modules and themes into a 'templates' directory inside that module directory.