[tasklist] Task Tags Dialog

Hi Tor,

here are my suggestions about the "Task Tags" dialog
- why didn't you place the list with tags in a JScrollPane?
- space between/placement of the buttons. Do you know   
  about http://ui.netbeans.org/docs/checklist/index.html?
- It may be hard to understand why the "Add" and "Change" 
  buttons are disabled by default and how they work
- what do you think about using a JTable with 2 columns?
  Tag   | Priority
 -----------------
 @todo  | Medium
 @TODO  | Medium
 <<<<<  | High

Tim