Allow advanced searching in FOAF (and elsewhere)

When the context is a product/package/distro, we can have a single page which allows advanced searching, because it'll always be clear that on this page you'll be searching through all bugs reported about that context. This is not true with people, so it looks to me like we'll have to have the option to use the advanced form on every bug page under a person's page ('Bugs Assigned', 'Bugs Reported', 'Bugs Subscribed', 'Bugs on Maintained Software').

How does it sound?

It sounds painful, but perhaps Matthew has a suggestion on how to make the UI less horrible. Remember to get Steve to sign off on this change.

I think every search form should have an "Advanced" button that displays the advanced form, with the current values from the simple form (if any) filled in. That way if you're halfway through entering a search and you realize you need to use some advanced options (or you can't remember whether to type "assignee:bradb" or "assigned:bradb" into the simple form), you can jump to the advanced form without losing what you've already typed.

To begin with this can be a submit button that goes to a separate page, and eventually this can be supplemented with JavaScript disclosure.