Issue #2408899 by mariacha1. Fixed regression: "Not" filters no longer working
Issue #2365889 by hefox: Change field description to be prettier
Issue #1932480 by goodydc: Date field handler
Issue #1999986 by girishmuraly: Errors displayed to anonymous.
Issue #1750952 by theapi: Argument handlers not working.
Fix problem with wrong alias when adding the same field twice
Issue #2304685 by juampy: Respect filter grouping
Issue #1991722 by itarato: Dates are malformed due to undefined define.
Issue #2145205 by MiroslavBanov: Support exposed sorting and multiple sorting criteria.
Issue #2063611 by Renee S: Ensure my table called but query has no ensure_table method
Issue #1651386 by akoepke: HTML entities in Solr index being escaped again
Issue #2191157: Date filter does not work with relative date
Issue #1761432 by loopduplicate: PHP Notice
Issue #1791908 by mindbat: Strict warning
Issue #1632202 by brenk28 | ygerasimov: Score field.
commit as per #1545966 from torgospizza
Issue #1327876 by pwolanin | modstore: Fixed Having module enabled more than triples page load time.
Issue #1650482 by ygerasimov: Query preview.
Add helper function trim_value() for filter handler.
Issue #1645506: Add string handler.
Pass defType parameter to the query.
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