FreeNAS Code

Prevent the autotuner from regenerating deleted tunables and sysctls, which makes
it seem like settings created by the autotuner can't be deleted.

Add adv_autotune to Advanced, default to off

Requested-by: jpaetzel

Add remaining ordering for system models

Fix icon names/places for cron/scrub.

Also remove the openCron js function which is useless.

Add explicit ordering for NTPServer and Cron.

While I'm here add description to View Cron Jobs

Set some default values for CronJobs and Rsync Tasks

Better worded help text for rsync remote path

Suggested-by: gcooper

Add help text to rsync remote path field

Make the new tracebacks be on by default

Requested-by: gcooper

Change the unicode name of Rsync task model

As requested, use short description, remote module name or remote path, in that order.
Previously the object id and user were being used, which is not much helpful.