Are there any filters to add additional columns to the list table on edit-comments.php?

I’m afraid that there is no easy way to get that done yet because the only hook i found is manage_comments_custom_column and that is an action hook and not a filter hook so you can’t add columns like manage_posts_columns. so as far as i can tell the long way here is the only way. but you can almost duplicate the default edit-comments.php and extending small classes like wp_post_comments_list_table and more.