Added new gppa_object_type_filter_after_processing and gppa_has_empty_field_filter_value PHP filters.
Fixed issue where numeric filters such as greater than were not working correctly with the Gravity Forms Entry Object Type.
Fixed regression where property values would not show for the Database Object Type in the Form Editor.
Fixed issue where Value population did not work correctly for Option fields using the Checkbox Field Type.
Fixed a potential PHP warning on the Entry Details screen.
Improved error handling during queries in the event that a WP_Error object gets returned for various reasons (missing taxonomy, etc).
