Enhancements

• Allow using PORO decorators. #6249 by @brunvez
• Make sure ActiveAdmin.routes provides routes in a consistent order. #6124 by @jiikko
• Use proper closing tags for HTML in ModalDialog component. #6221 by @javierjulio

Bug Fixes

• Fix comment layout so regardless of size, each is aligned and spaced evenly. #6393 by @Ivanov-Anton

Translation Improvements

• Fix several Arabic translations. #6368 by @mshalaby
• Add missing scope/all italian translation. #6341 by @fuzziness
• Improve Japanese translation. #6315 by @rn0rno
• Fix es and es-MX sign_in and sign_up translation. #6210 by @roramirez

Documentation

• Fix filter_columns_for_large_association and filter_method_for_large_association examples. #6232 by @ndbroadbent

Dependency Changes

• Allow formtastic 4. #6318 by @deivid-rodriguez
• Drop Ruby 2.4 support. #6198 by @deivid-rodriguez