Update Scheduled Job With Job Re-Definition

When modifying a scheduler job, I have to un-schedule and re-schedule the job to make the change effective. At least when I invoked the Trigger link in the Job Scheduler the last version of the job was started. Would be nice if the scheduler update would be automatically done on saving the job.

Implementation given here: http://snippets.xwiki.org/xwiki/bin/view/Extension/ReinitSchedulerJob/