Issue #2367933 by phenaproxima, mikelutz, Berdir, voleger, amateescu, chr.fritsch, johndevman, Jo Fitzgerald, andypost, larowlan, alexpott: Move entity_get_(form_)display() to the entity display repository

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2337191 by tim.plunkett, dawehner, jibran, yched, Wim Leers, catch: Split up EntityManager into many services