v9.0.0.beta5

What's Changed

• fix custom event detail by @dnoneill in #3665
• Extract methods for overriding bookmark response by @jcoyne in #3667
• Add bookmark-counter class and update bootstrap 5 classes by @jcoyne in #3669
• Remove facet_pivot partial as it is no longer used. by @seanaery in #3670
• Set requested with header on fetch request by @jcoyne in #3672
• Fix pivot facet accessibility by using tree, treeitem aria roles. Fix… by @seanaery in #3671
• Fix color contrast accessibility in facet headers. Fixes #3560. by @seanaery in #3666
• BookmarkComponent is no longer an ancestor of ActionComponent by @jcoyne in #3668
• Remove all remaining vestiges of Bootstrap 3 & 4 classes/attributes. Resolves #3675 by @seanaery in #3676
• Ensure facets on advanced search form styles are consistent with side… by @seanaery in #3674
• Fix pivot facet alignment and expander styles; improve example pivot config. Fixes #3554 & #3679. by @seanaery in #3680
• Commit the compiled blacklight.css file from #3680 pivot facet style … by @seanaery in #3682
• Add comments to SearchState#filters by @jcoyne in #3683
• Only render the flash message partial when there are messages to show… by @seanaery in #3684
• Provide a way for applications to customize search result retrieval by @jcoyne in #3685

Full Changelog: v9.0.0.beta3...v9.0.0.beta5