Show editorial comments on "Edit Comments"

gistfile1.php

<?php
/**
 * Add editorial comments to the Edit Comments list view
 */
add_filter( 'comments_clauses', 'efx_add_editorial_comments' );
function efx_add_editorial_comments( $clauses ) {
	global $pagenow;

	if ( 'edit-comments.php' != $pagenow ) {
		return;
	}

	$clauses['where'] = str_replace( "( comment_approved = '0' OR comment_approved = '1' )", "( comment_approved = '0' OR comment_approved = '1' OR comment_approved = 'editorial-comment' )", $clauses['where'] );

	return $clauses;
}
/**
 * Remove the action links from editorial comments in the Edit Comments list view
 */
add_filter( 'comment_row_actions', 'efx_filter_comment_row_actions', 10, 2 );
function efx_filter_comment_row_actions( $actions, $comment ) {

	if ( 'editorial-comment' !== $comment->comment_type ) {
 		return $actions;
	} 

	return array();
}