Filter wp comment types dropdown for custom comments types

gistfile1.php

add_filter( 'admin_comment_types_dropdown', 'tdp_admin_comment_types_dropdown' );
function tdp_admin_comment_types_dropdown( $types ) {
    //replace parts as needed
    $types['your_note_type'] = __( 'Your Note Type', 'your-text-domain' );
    return $types;
}