Fixed potential PHP error if ordering by a taxonomy and there are more than one of the taxonomy attached to the post.
Fixed issue where Live Merge Tags in Drop Down field choice values were not being updated in some situations such as when used with Nested Forms {Parent} merge tags. Fixed Live Merge Tags not always returning dates immediately.
Updated usages of GPPA_Object_Type::isRestricted() to GPPA_Object_Type::is_restricted().
