Issue #1510544 by swentel, Bojhan, Gábor Hojtsy, merlinofchaos, Cottser, Wim Leers, plopesc, aspilicious, sannejanssen,  larowlan, tim.plunkett, nod_: Fixed Show previews in front-end theme, able to select different view modes.
Issue #2324353 by chx: Remove MigrateEntityDestinationFieldInterface.
Issue #2318087 by tim.plunkett: Replace ['input'] with FormState::getUserInput().