WIP advanced search UI bits
WIP improve ability to hide advanced search form
WIP Introduce advanced_query to the backend search as param 'aq'
WIP tweak query objects and public search form
Have map_hash_with_schema figure out the schema where none is specified.
Rollback changes to JSONSchemaUtils#determine_schema_for so amiguious objects require a jsonmodel_type to be present; Add OR to the boolean_query; Add Clear button to the advanced search; Retain all advanved search params in the queary string so facets and sort actions retain query filters;
Merge pull request #322 from hudmol/public-advanced-search

[Delivers #43807809] Public advanced search