Issue #2277941 by yched: Allow injecting an arbitrary FieldConfig when building a FieldInstanceConfig.
Issue #2211227 by mondrake, xjm | fietserwin: Refactor image and imagetoolkit: isExisting, isSupported, supportedTypes, getMimeType.
Issue #1921970 by IshaDakota, benelori, mitron: Clean up comments in core .views.inc files.
Issue #1929010 by mgifford: Fixed Improve Contrast for onfocus Menu Items.