Make adhoc page load nodes via ajax only
Add default filter key of node name

also allow multiple filter entries to be joined via comma
Remove unused files
Fix: uncaught exception causes NPE and lost workflow state

* handle potential null in WorkflowExecutionStateListenerAdapter
* catch throwable and set result objects when reporting state
Update nodes page/commands page

* load nodes async via ajax
* update node filter form
* filter links within pages stay within the page