Issue #2315613 by damiankloip, Wim Leers: Add a services.local.yml for development.
Issue #2269025 by penyaskito, andypost, grom358, Berdir, mikeegoulding, larowlan: Fixed CommentManager::getAllFields() should have a static cache.
Issue #2313157 by Gábor Hojtsy: Fixed Optimize admin language detection and make it optional.
Issue #2316459 by Gábor Hojtsy: Fixed Menu ui module refers to nonexistent library, lacks menu parent validation on content type settings.