Fixed issue where fetching meta from Taxonomy Terms was not consistent with the behavior of the Posts and Users Object Types. The expected behavior is to fetch meta with the $single parameter set to true.
Fixed issue with Live Merge Tag values coming from conditionally hidden fields with inputs (such as Address field).
Updated "Ordering" property dropdown in Field Settings to use option groups like the property dropdown for filters.
Added support for ordering by user meta to the User Object Type.
Fixed PHP notice in certain AJAX requests.
