In the Sent folder (v.7.1.4 NE), clicking in the column header for Subject or Date sorts messages by those fields. Clicking on the To header, however, a search box opens. Users want the sort, not a search, so they can quickly evaluate sent messages for possible deletion.
Searching Forums, posts on this topic are no more recent than 3 years old. These stale posts provide to Bugzilla links that say FIXED. Was this issue solved, then rebroken? Is there a current fix or workaround?