Ability to define filters on the id field after the initial filter definition has loaded 

Added a use case and code modification to allow filters based on the id field. These kind of filters will allow for the filtering directly on the id field instead of building the category_map when data is added. It is even possible to add these filters if all data has been loaded.

This feature was added to support the ability to load filters when needed and because an id is always required we can optimise the searching on the servers side to return only ids. If you don't want to use server side date it is still possible to define it manually by providing a data attribute (data-ids) on the filter element.