Followup search updates including letting the score field have an option to set another field as the default tablesort if it is set to the default tablesort.

Major re-organization of handlers. PLEASE NOTE: This drastically affected the Views module API and until modules are updated to match, they will stop working. Efforts have been made to ensure that this won't cause your site to crash, but that's partly up to the individual module as well.

Unnecessary label on exposed search form; missing "Group" designation on upload: attached files; some minimal but useful documentation on writing handlers

Some refactoring of how handlers are handled, particularly with their default options. This is an unfortunately widespread change and will affect modules utilizing the API.

#239044: backlinks for search module; also, some cleanup to view export (this means all existing default views need to be re-exported to get this cleanup)

A basic analyzer to help find problems, though it needs more analyzing. Plus, new theming information that will really help people figure out exactly what templates they can use to affect their output.