Add trigger to Filter widget

[Anonymous User]

Please add a trigger to the Filter widget so that other widgets can be notified when a filter is added/removed/altered.  Ideally the generated message would contain the same SQL string which is used for the "where" property in the updateQueryParams method.

I have custom widgets which need to respond to filter changes.  This enhancement would allow an Experience author to "wire together" the out-of-the-box Filter widget and the custom widgets in the Builder environment without having to resort to custom programming.