Release v2.7.0

Release v2.7.0

release-check: OK a9839e0

Changelog

"Back to …" control for page headers. See UPGRADING.

Added

• View\BackLink and PageHeader::$back (last constructor argument, kept by withActions() / withTabs()): a compact
  "Back to …" link with the prev icon above the title.
• Theme partial back_link (partials/_back_link.html.twig: href, label, icon, class, testid) for pages that
  do not build a PageHeader, and theme slot back_link (.nowo-ui-back-link, framework defaults for Bootstrap,
  Tailwind and Foundation).