diff -r be944660c56a -r 3d72ae0968f4 wp/wp-admin/includes/ajax-actions.php
--- a/wp/wp-admin/includes/ajax-actions.php	Wed Sep 21 18:19:35 2022 +0200
+++ b/wp/wp-admin/includes/ajax-actions.php	Tue Sep 27 16:37:53 2022 +0200
@@ -158,6 +158,7 @@
 			'name__like' => $s,
 			'fields'     => 'names',
 			'hide_empty' => false,
+			'number'     => isset( $_GET['number'] ) ? (int) $_GET['number'] : 0,
 		)
 	);
 
@@ -1071,16 +1072,21 @@
 	}
 
 	if ( ! $tag || is_wp_error( $tag ) ) {
-		$message = __( 'An error has occurred. Please reload the page and try again.' );
+		$message    = __( 'An error has occurred. Please reload the page and try again.' );
+		$error_code = 'error';
 
 		if ( is_wp_error( $tag ) && $tag->get_error_message() ) {
 			$message = $tag->get_error_message();
 		}
 
+		if ( is_wp_error( $tag ) && $tag->get_error_code() ) {
+			$error_code = $tag->get_error_code();
+		}
+
 		$x->add(
 			array(
 				'what' => 'taxonomy',
-				'data' => new WP_Error( 'error', $message ),
+				'data' => new WP_Error( $error_code, $message ),
 			)
 		);
 		$x->send();
@@ -1102,10 +1108,24 @@
 	$wp_list_table->single_row( $tag );
 	$parents = ob_get_clean();
 
+	require ABSPATH . 'wp-admin/includes/edit-tag-messages.php';
+
+	$message = '';
+	if ( isset( $messages[ $tax->name ][1] ) ) {
+		$message = $messages[ $tax->name ][1];
+	} elseif ( isset( $messages['_item'][1] ) ) {
+		$message = $messages['_item'][1];
+	}
+
 	$x->add(
 		array(
 			'what'         => 'taxonomy',
-			'supplemental' => compact( 'parents', 'noparents' ),
+			'data'         => $message,
+			'supplemental' => array(
+				'parents'   => $parents,
+				'noparents' => $noparents,
+				'notice'    => $message,
+			),
 		)
 	);
 
@@ -1271,7 +1291,7 @@
 	if ( empty( $post->post_status ) ) {
 		wp_die( 1 );
 	} elseif ( in_array( $post->post_status, array( 'draft', 'pending', 'trash' ), true ) ) {
-		wp_die( __( 'Error: You can’t reply to a comment on a draft post.' ) );
+		wp_die( __( 'You cannot reply to a comment on a draft post.' ) );
 	}
 
 	$user = wp_get_current_user();
@@ -1301,7 +1321,7 @@
 	}
 
 	if ( '' === $comment_content ) {
-		wp_die( __( 'Error: Please type your comment text.' ) );
+		wp_die( __( 'Please type your comment text.' ) );
 	}
 
 	$comment_parent = 0;
@@ -1403,7 +1423,7 @@
 	}
 
 	if ( '' === $_POST['content'] ) {
-		wp_die( __( 'Error: Please type your comment text.' ) );
+		wp_die( __( 'Please type your comment text.' ) );
 	}
 
 	if ( isset( $_POST['status'] ) ) {
@@ -3003,7 +3023,7 @@
 		$total_posts = $count_query->found_posts;
 	}
 
-	$posts_per_page = (int) $attachments_query->query['posts_per_page'];
+	$posts_per_page = (int) $attachments_query->get( 'posts_per_page' );
 
 	$max_pages = $posts_per_page ? ceil( $total_posts / $posts_per_page ) : 0;
 
@@ -3558,6 +3578,19 @@
 
 	$update_php = network_admin_url( 'update.php?action=install-theme' );
 
+	$installed_themes = search_theme_directories();
+
+	if ( false === $installed_themes ) {
+		$installed_themes = array();
+	}
+
+	foreach ( $installed_themes as $theme_slug => $theme_data ) {
+		// Ignore child themes.
+		if ( str_contains( $theme_slug, '/' ) ) {
+			unset( $installed_themes[ $theme_slug ] );
+		}
+	}
+
 	foreach ( $api->themes as &$theme ) {
 		$theme->install_url = add_query_arg(
 			array(
@@ -3589,12 +3622,19 @@
 			}
 		}
 
+		$is_theme_installed = array_key_exists( $theme->slug, $installed_themes );
+
+		// We only care about installed themes.
+		$theme->block_theme = $is_theme_installed && wp_get_theme( $theme->slug )->is_block_theme();
+
 		if ( ! is_multisite() && current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) ) {
+			$customize_url = $theme->block_theme ? admin_url( 'site-editor.php' ) : wp_customize_url( $theme->slug );
+
 			$theme->customize_url = add_query_arg(
 				array(
 					'return' => urlencode( network_admin_url( 'theme-install.php', 'relative' ) ),
 				),
-				wp_customize_url( $theme->slug )
+				$customize_url
 			);
 		}
 
@@ -3910,13 +3950,13 @@
 			}
 
 			/** This filter is documented in wp-admin/includes/class-custom-image-header.php */
-			$cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication.
-			$object  = $wp_site_icon->create_attachment_object( $cropped, $attachment_id );
-			unset( $object['ID'] );
+			$cropped    = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication.
+			$attachment = $wp_site_icon->create_attachment_object( $cropped, $attachment_id );
+			unset( $attachment['ID'] );
 
 			// Update the attachment.
 			add_filter( 'intermediate_image_sizes_advanced', array( $wp_site_icon, 'additional_sizes' ) );
-			$attachment_id = $wp_site_icon->insert_attachment( $object, $cropped );
+			$attachment_id = $wp_site_icon->insert_attachment( $attachment, $cropped );
 			remove_filter( 'intermediate_image_sizes_advanced', array( $wp_site_icon, 'additional_sizes' ) );
 
 			// Additional sizes in wp_prepare_attachment_for_js().
@@ -3940,21 +3980,48 @@
 			/** This filter is documented in wp-admin/includes/class-custom-image-header.php */
 			$cropped = apply_filters( 'wp_create_file_in_uploads', $cropped, $attachment_id ); // For replication.
 
-			$parent_url = wp_get_attachment_url( $attachment_id );
-			$url        = str_replace( wp_basename( $parent_url ), wp_basename( $cropped ), $parent_url );
+			$parent_url      = wp_get_attachment_url( $attachment_id );
+			$parent_basename = wp_basename( $parent_url );
+			$url             = str_replace( $parent_basename, wp_basename( $cropped ), $parent_url );
 
 			$size       = wp_getimagesize( $cropped );
 			$image_type = ( $size ) ? $size['mime'] : 'image/jpeg';
 
-			$object = array(
-				'post_title'     => wp_basename( $cropped ),
-				'post_content'   => $url,
+			// Get the original image's post to pre-populate the cropped image.
+			$original_attachment  = get_post( $attachment_id );
+			$sanitized_post_title = sanitize_file_name( $original_attachment->post_title );
+			$use_original_title   = (
+				( '' !== trim( $original_attachment->post_title ) ) &&
+				/*
+				 * Check if the original image has a title other than the "filename" default,
+				 * meaning the image had a title when originally uploaded or its title was edited.
+				 */
+				( $parent_basename !== $sanitized_post_title ) &&
+				( pathinfo( $parent_basename, PATHINFO_FILENAME ) !== $sanitized_post_title )
+			);
+			$use_original_description = ( '' !== trim( $original_attachment->post_content ) );
+
+			$attachment = array(
+				'post_title'     => $use_original_title ? $original_attachment->post_title : wp_basename( $cropped ),
+				'post_content'   => $use_original_description ? $original_attachment->post_content : $url,
 				'post_mime_type' => $image_type,
 				'guid'           => $url,
 				'context'        => $context,
 			);
 
-			$attachment_id = wp_insert_attachment( $object, $cropped );
+			// Copy the image caption attribute (post_excerpt field) from the original image.
+			if ( '' !== trim( $original_attachment->post_excerpt ) ) {
+				$attachment['post_excerpt'] = $original_attachment->post_excerpt;
+			}
+
+			// Copy the image alt text attribute from the original image.
+			if ( '' !== trim( $original_attachment->_wp_attachment_image_alt ) ) {
+				$attachment['meta_input'] = array(
+					'_wp_attachment_image_alt' => wp_slash( $original_attachment->_wp_attachment_image_alt ),
+				);
+			}
+
+			$attachment_id = wp_insert_attachment( $attachment, $cropped );
 			$metadata      = wp_generate_attachment_metadata( $attachment_id, $cropped );
 
 			/**
@@ -4129,6 +4196,9 @@
 		}
 	}
 
+	$theme                = wp_get_theme( $slug );
+	$status['blockTheme'] = $theme->is_block_theme();
+
 	if ( ! is_multisite() && current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) ) {
 		$status['customizeUrl'] = add_query_arg(
 			array(