* add cc addresses and post_id to sent email logs
* sort cc addresses by email address filter value and collapse additional addreses into tooltip
* add slice helper for use in ember tempaltes
Follow up to 4d3c1ceb44b87d3bcb9c5eb2472d86b0cd2b2b0b, this commit
shows the SMTP response in the admin email sent list and also moves the
topic/post link into a new column. Reply key is now in its own column.
