comment_type of reply should be same as parent

[erikdemarco]

When you creating a reply for custom comment_type. Lets say our comment_type is for 'product_review'. When we create a reply from admin panel. The comment_type of the reply created as 'comment', which doesnt make sense. So our reply will not be shown in comment_list for 'product_review'.

Or we can make user decide if this comment should be created as the same comment_type as the parent via checkbox in the comment reply form in admin panel.