Support more quick search operators in quick search

It would be nice to have following type of special operators in FishEye quick search. For example, to search content with both 'database' and 'user' terms:

Quick Serach: "Content: database && user"
Corresponding EyeQL search:

select revisions from dir "/" where content matches "database" and content matches "user" order by date  desc  group by changeset return path, revision, author, date, csid