Issue #1363112 by mparker17, mgifford, tlattimore, Jacine, dcmouyard, bowersox, ry5n, ahdiaz: Simplify names of 'element-x' helper classes.

Issue #1620010 by dawehner, ParisLiakos, plach, jibran: Move LANGUAGE constants to the Language class.

Issue #1874664 by Wim Leers, jessebeach, Gábor Hojtsy, David_Rothstein, effulgentsia: partial rollback.

Issue #1874664 by Wim Leers, jessebeach, tkoleary, Gábor Hojtsy, quicksketch, Bojhan: Reconcile 'Edit' toolbar option with local tasks (tabs) and contextual links for editing.

Issue #1751606 by swentel, ry5n, mrfelton, nod_, sun, sannejanssen: Move published status checkbox next to 'Save'.

Issue #1797200 by pillarsdotnet, boombatower, solotandem, ZenDoodles, sun, xjm, yched, Damien Tournoud: (crediting those who worked on previous versions of this patch as well) Remove t() from test assertions in node module

Issue #1184272 by Berdir, corvus_ch, sun: Remove deprecated $conditions support from entity controller.