Issue #3191468 by Gábor Hojtsy, xjm, ckrina, DeepaliJ, bskibinski, Deepthi...

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