clarify what will happen when clicking on sender column in message list
|Reported by:||nturner||Owned by:|
When a user clicks on the name of a sender in the message list, a new email to that person is opened. This is somewhat unexpected, as clicking anywhere else on that line (other than the read/unread toggle, which has a fairly standard format) will simple select the message. This patch adds some visual feedback to indicate that the sender is a link and does something different than the rest of the line.