wintercms/winter v1.0.449 on GitHub

UX/UI Improvements:

Redirect users with the manage_theme_options (but not the manage_themes) permission directly to the Customize theme page
Dashboard now uses a 12-column layout instead of a 10-column layout
Show a "not found" message when the image selected by a mediafinder FormWidget does not exist
Added link to backend updates page to see a detailed changelog for the current build
Minor improvements to the styling of the clear search button

Support enableDefaults on repeaters using grouped mode
Simplified the Repeater item's data saving process by calling each item's Form widget's getSaveData() method instead of attempting to process the data directly.
Disabled FormWidgets are now ignored in the Form widget's getSaveData() method just like regular form fields are.
Backend Controller middleware support has been changed to only support 'after' middleware as it requires instantiating plugin controllers in order to retrieve the middleware that they have registered, which calls the constructor for those controllers; which is where the problem is (Controller constructors often, for one reason or another, do things that require the session to be started, for instance, getting the current user)
Added support for headCssClass in the Lists widget's column definitions to specify a CSS class to be added to the table header cell for that column.
Added allowTrashedSlugs property to models that use the Sluggable and SoftDelete database traits to include the slugs of records that have been soft deleted when checking to see if a slug already exists.

Fixed Save & Close button on the ThemeOptions update view
Fixed long standing issue with being unable to update translated values with the RelationController
Fixed issue where Repeaters with the same field names being bound to the same controller would cause confusing conflicts as they tried to process each other's data.
Fixed issue where having the CMS module present but disabled would still try to handle backend 404's with the CMS controller.
Fixed issue where multiple Filter widgets could not exist on the same page at the same time.
Fixed support for migration files with extra .s in their file names (ex. 1.0.5.update_posts.php)
Fixed issue where the popup loading indicator would sometimes not close after the request had finished loading
Improved FireFox & IE11 support by fixing race conditions in backend JS

Fixed issue with Twig 2.7.4
Replaced all deprecated Twig PSR-0 class references with the new PSR-4 class references.
Updated Froala to 2.9.3