Issue #2563751 by borisson_, rocketeerbkw, cilefen, NikitaJain, imanol.eguskiza, pjonckiere: Password field errors on user create/edit/login when password is (literally) 0

Issue #2569069 by stefan.r, mr.baileys, alexpott, lauriii: Replace TranslationWrapper with TranslatableString and deprecate TranslationWrapper

Issue #2349819 by amateescu, swentel, Leksat, larowlan, dawehner, Gábor Hojtsy, mpdonadio, benjy, jmuzz, yched, jibran, marthinal, dmsmidt: String field type doesn't consider empty string as empty value

Issue #2418119 by Berdir, jhedstrom, larowlan, martin107, nlisgo, klausi, fago, Gábor Hojtsy: REST user updates bypass tightened user account change validation

Issue #2338559 by larowlan, damiankloip, hampercm, mradcliffe, jibran, Berdir, Fabianx, catch: Never serialize password fields by default