[bug 1100394] Implement simple_query_search in Advanced Search.

This was pretty easy. I still need to decide where the documentation should go. I kind of think it should be a KB article linked right from an (?)icon to the right of the search box.

Anyway, r?.

In particular, some fields will be `process_query_sqs`, and others will be `process_query_sqs_analyzer`, based on the localizationability of the field.