richfaces-jsf-event.js contains interceptor for jsf.ajax.request which brings event re-targeting javax.faces.source (
RF-12616) and also support for ajaxsubmit form event.
ajaxsubmit was brought in rich:editor implementation and is currently used additionally in rich:focus.
I suggest to merge richfaces-jsf-event.js to richfaces.js.
This feature would desire JS unit tests.
Don't forget to remove references to richfaces-jsf-event.js.