Issue #2985882 by tim.plunkett, Mirakolous, ravi.shankar, ayush9598, Rajab Natshah, andypost, Anybody, kattekrab, devarch, Freddy Rodriguez, adubovskoy, corneliusd, mradcliffe, longwave, lukasss, Pancho, Graber, dpi, joshf, lordzik, dorianwinterfeld, jacov, kdmdrupal, jlancaster, jborgesr, joarferme, tonytheferg, chrisrockwell, agilman, kducharm, Sam152, scotwith1t, labboy0276, Spokje, jazzfiction, Shrutidkadam, ab2211, Dave Kopecek, segx, alexmoreno, themaurice, the_glitch, NWOM, kwfinken, berliner, design.er, ouissla, zterry95, jamsilver, fonant, Rajendar Reddy, Christopher Riley, BramDriesen, webdrips: Workaround for "Call to a member function getLabel() after enabling layout_builder"

Issue #3191468 by Gábor Hojtsy, xjm, ckrina, DeepaliJ, bskibinski, Deepthi kumari, catch, Neslee Canil Pinto, Dennis Cohn, boulaffasae, bnjmnm, andypost, aleevas, antonellasevero, anu.a_95, bandanasharma, atul4drupal, cedric_a, codersukanta, Hardik_Patel_12, Krzysztof Domański, hash6, himanshu_sindhwani, heykarthikwithu, HOG, fhaeberle, Dinesh18, design.er, DyanneNova, effulgentsia, ethomas08, emma.maria, Adam Szalapski, kostyashupenko, tedbow, vishalchandna, volkerk, aburrows, Pls, martin107, lauriii, alwaysworking, VD39, anand.toshniwal93, dawehner, justafish, iKb, eojthebrave, finnsky, Ambient.Impact, tunic, alexpott, andrewmacpherson, antoineh, anmolgoyal74, slip, rsau, lhuria94, jeevanbhushetty, porkloin, progga, rahul01, pwilson, hudri, huzooka, ravi.shankar, reinchek, rensingh99, sauravk, saschaeggi, ranjith_kumar_k_u, SharmaAnmol, pradeepjha, prabha1997, pranav45, priyanka.sahni, rainbreaw, quiron, sd9121, shaal, tim.plunkett, thekishanraval, yoroy, nod_, Devipriya Rajamanickam, Archita Arora, thalles, tanubansal, Vinodhini.E, shashikant_chauhan, shimpy, sibustephen, swatichouhan012, siddhant.bhosale, pminf, phenaproxima, kiran.kadam911, katrienc, KondratievaS, Kristen Pol, Lal_, L2G2, katherined, katannshaw, Indrajith KB, imganesh, Jongruk Timmanee, iro, kapilkumar0324, joseph.olstad, Lendude, Maithri Shetty, mrinalini9, mradcliffe, narendra.rajwar27, neelam_wadhwani, olli, Peter Majmesku, modulist, mfairchild365, komalk, kishor_kolekar, martijn.cuppens, Meenakshi.g, Vidushi Mehta, Neetika K: Retire "Admin UI and JavaScript Modernisation" initiative in favour of "Decoupled menus" and the upcoming "Easy out of the box" initiative