add title, summary, and source to search form, with custom validation to require at least on search term [#60341698]
minor cleanup: tweak result count wording/pluralization; make fulltext score visible when in debug mode
display form-wide validation errors, and display new advanced search fields on the form [#60341698]
configure full-text indexing for title/summary/source fielded search; tweak model xpaths for more efficient queries [#60341698]
update search view logic to search on title/summary/source when there are terms present [#60341698]
unit tests for search form validation, search view logic [#60341698]