The DataGrid form widget has been moved to a standard widget called Grid.

Restyled the CMS tabs

Added new Backend control for creating informative panels (hints).

Added new properties to RelationController: readOnly, showSorting, defaultSort.

Hashable, Sluggable, Purgeable and Validation traits must now be used in the Model class definition.

Plugins can now extend existing Back-end navigation menu items, see Event docs for an example.

Required form fields now sport an asterisk (*) character at the end of their label.

Added new layout and page method onInit() called after components are initialized and before AJAX requests are processed.

Important! All references to Email have been changed to Mail and renaming may be required in plugins.

Console command october:update now supports --core, --plugins and --force options.

Created a new Record Finder form widget for searching related records.

All instances now use the Cron queue driver by default (see config queue.default).