Issue #3401730 by kim.pepper, smustgrave, longwave: Add default autoconfigure to all *.services.yml and remove event_subscriber tags

Issue #2571371 by shubham.prakash, Berdir, ytsurk, Wim Leers, tstoeckler, Gábor Hojtsy: Editor settings cannot be translated

Issue #2247779 by Wim Leers, larowlan, dawehner: Allow #pre_render, #post_render and #post_render_cache callbacks to be service methods.

Issue #2118991 by Berdir, dawehner: Use abstract service definitions to minimize copy & pasted service definitions.

Issue #1930020 by dawehner, Berdir, olli: Inject a class into the Core annotated discovery implementation so that namespaces can be updated.