Improved asset caching (cms.enableAssetCache), when enabled the server will send a 304 Not Modified header.

Introduced new Table widget and DataTable form widget.

There is now a simpler way for sending mail via Mail::sendTo().

The List Filter query can now be extended with controller override listFilterExtendQuery().

Add new methods propertyName() and paramName() to Component base class for accessing names of external properties.

Native alert and confirm functions have been styled in the back-end.

Back-end user groups have a new description field, this is shown in the group list and when creating a new administrator.

Back-end user groups can now be marked to add new administrators by default. This affects when a group is created (if checked, all administrators are added to the group) and creating a new administrator (the default groups are checked by default).

Config item cms.customErrorPage is deprecated, the setting app.debug should be used instead.

Config item cms.enableAssetMinify can now be set to null, in which case assets are only minified if debug mode (app.debug) is disabled.

Settings pages now have a Reset to default button.

The field authorUrl has been renamed to homepage in theme.yaml files.