Introduced new MediaFinder form widget.

Improved the back-end administrator permissions and RelationController UI.

The page setting hidden has been renamed to is_hidden, this setting may need to be reapplied for some themes.

FileUpload` form widget has been rebuilt from scratch, it now uses an interface similar to the Media Manager (see Backend > Forms docs).

The |page filter now supports passing an empty string to generate a link to the current page.

The hotkey for full screen mode is now Cmd+Shift+F or Ctrl+Shift+F in Windows.

Optimized many JavaScript libraries used in the back-end to reduce memory leaks.

Protected files can now be downloaded by administrators using the fileupload form widget.

The {% content %} tag now supports passing parameters, parsed by a basic template engine (see Cms > Content block docs).

Added Media Manager feature.

Adds experimental command october:mirror for generating symbolic links in a public directory.

Various performance improvements.