Add setting to sort Reviews by Date Created Desc OR Asc

Right now the default sort is in ascending order which means the oldest post will show up first. I think it's worth having an option that allows the store owner to decide if the post should be sorted in Ascending or Descending order.

Also, in the admin console the posts are sorted in Ascending order which means you have to click through to the last page to approve new reviews.

Thanks a lot for suggestion! Please find this work item here

Done. Please see this commit for more details