* Improve `activity_handle_undo` action

This PR improves the action handling and prevents PHP warnings.

* add `null` as possible type

* use the $user_id from the Inbox-Request

* Update includes/handler/class-undo.php

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Co-authored-by: Konstantin Obenland <obenland@automattic.com>

* Add title to content if post is a `Note`

* also add better headline handling to shortcodes

* use new shortcode

* simplify settings

* add missing phpdoc

* some improvements

* unit tests

* update unit-tests

* change default type

* add migration of object_type and tests

* remove shortlink from default template

* Fallback to blog-user if user is disabled

Fallback to the blog-user if enabled and the specific user is disabled.

fix #948

* add test case

* test-class-activitypub-activity-dispatcher.php aktualisieren

Co-authored-by: Konstantin Obenland <obenland@automattic.com>

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Co-authored-by: Konstantin Obenland <obenland@automattic.com>

Bumps [@wordpress/blocks](https://github.com/WordPress/gutenberg/tree/HEAD/packages/blocks) from 13.10.0 to 14.0.0.
- [Release notes](https://github.com/WordPress/gutenberg/releases)
- [Changelog](https://github.com/WordPress/gutenberg/blob/trunk/packages/blocks/CHANGELOG.md)
- [Commits](https://github.com/WordPress/gutenberg/commits/@wordpress/blocks@14.0.0/packages/blocks)

---
updated-dependencies:
- dependency-name: "@wordpress/blocks"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Matthias Pfefferle <pfefferle@users.noreply.github.com>
Co-authored-by: Matt Wiebe <wiebe@automattic.com>

* Fix Fediverse preview for "blog actor only" mode.

* that simply should do the trick!

thanks for reporting that!!!

* 0 is reserved for the blog user

* simplify code a bit!

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Co-authored-by: Matthias Pfefferle <pfefferle@users.noreply.github.com>

* Support `comment_previously_approved` setting

* return `$approved` instead of `true`

* some small fixes

* return int

* improved check

* hide sticky posts that are not public

* remove value

* check if meta does not exist

* also ignore for outbox query!

* Delete `activitypub_content_visibility` when updated to an empty value.

* hide only local posts in outbox

* add unit tests