bug tracker: issues to verify

[Graham Percival]

"Issues to Verify" lists all issues that are
- fixed: I should check them in the latest lily and mark verified
- duplicate: I should... what?  Ignore them and leave them in the list?
- invalid: I should... what?

If I ignore the duplicate/invalid bug reports, then eventually we'll 
have over a page of such issues.  I suppose I could ignore the "issues 
to verify" search and manually search for "fixed", but there should be a 
better solution.

Cheers,
- Graham