Database maintenance. Updated all timestamp columns to be nullable.

Model date formats now support translation based on the application locale.

Add a new mode switch to list filters. Also added support for passing an array of options or a model method to the group mode (see Backend > Lists docs).

Introduced a new back-end timezone setting, set via cms.backendTimezone or user preferences. Displayed dates are now converted from the application timezone to the backend timezone. Dates are also displayed in the correct format based on the locale, either set in the user preferences or the app.locale config.

Fixes a redirection bug when saving a mail template.

Record Finder form widget now supports scopes, conditions and search options (see Backend > Forms docs).

Added mode and scope options to list search (see Backend > Lists docs).

Introduced different back-end navigation display modes.

User interface improvements.

Improves performance when accessing locally stored uploads.

Added form support for Morph One relation types.

Improved mobile navigation in the back-end area.