Issue #3084983 by plach, amateescu, catch, Berdir, xjm: Move all the code related to path aliases to a new (required) "path_alias" module

Issue #3007832 by amateescu, Berdir, andypost, alexpott: Convert custom path alias forms to entity forms

Issue #2378055 by Gábor Hojtsy: Reorganise config schema for entity_form_display / entity_view_display

Issue #2368349 by Gábor Hojtsy, alexpott: Entity view and form display configuration schemas are too verbose / key ones missing

Issue #2295737 by Gábor Hojtsy, vijaycs85, alexpott: Fixed Not all shipped configuration passes validation even with all modules enabled.