I addressed Ezio's issue with the popup editor including retired values.

See commit: 0142b4fb5a2d

It was a simple commit, but while committing the following question
came up:

   Supposed a keyword is retired and I want to search for an issue
   with that retired keyword?

Do we have a best policy document that says to remove retired keywords
from all places it could possibly be used? It could be argued that the
simple search dropdown is wrong and should allow selecting retired values.

There are no comments in hg or the code to tell me how the developer
interpreted the meaning of "Retired" and if the decision to leave
retired values in the popup was intentional.

-- rouilj