Issue #3097889 by longwave, paulocs, anushrikumari, SenthilMohith, andypost, Gábor Hojtsy, catch, lauriii, Wim Leers: Remove deprecated theme functions

Issue #3095739 by jhodgdon, siddhant.bhosale, pratik_kamble, andypost, ayushmishra206, SenthilMohith, kleiton_rodrigues, daffie, catch, snehalgaikwad: Convert admin UI-related modules: contextual, help, inline_form_errors, quickedit, settings_tray, shortcut, toolbar, tour module hook_help() to topic(s)

Issue #2920309 by jhodgdon, Amber Himes Matz, alexpott, larowlan, andypost, vadim.hirbu, effulgentsia, diqidoq, jibran, webchick, catch, xjm, jhedstrom, Gábor Hojtsy, dawehner, Berdir, tim.plunkett, benjifisher, markcarver, yoroy, ckrina, amateescu, gnuget, webflo, Greg Boggs, yo30, vijaycs85, SenthilMohith, andrewmacpherson, EclipseGc, sandboxpl, MariaDenysyuk, tstoeckler, miro_dietiker, Mixologic, RoloDMonkey, timmillwood, Fabianx: Add experimental module for Help Topics

Issue #2749901 by MaskyS, kleog, priya.chat, harsha012, rakesh.gectcr, shobhit_juyal, snehi, SenthilMohith, neerajpandey, gawaksh, thompsizzle, ecrown, mohit1604, andrewmacpherson, surbz, rahulrasgon, riddhi.addweb: Add README.txt to Bartik theme