change "Anonymous" to "Unassigned"

Case number:200-17
Project:Case Tracker
Opened by:bhorst
Status:Open
Assigned:DaveNotik
Priority:2
Type:Suggestion
Opened on:Monday, December 31, 2007 - 14:34
Last modified:Monday, December 31, 2007 - 14:34

For the "Assign to" field when creating or editing a Case, I think "Unassigned" has a clearer meaning than "Anonymous." I suggest we change this terminology, or at least add "Unassigned" as a synonym that functions the same as "Anonymous."