FreeNAS Code

Fix icon names/places for cron/scrub.

Also remove the openCron js function which is useless.

Add additional context -- just in case.

Do-Not-Merge: already handled.

Rename "loaders" to "tunables"

custom view for all ntpservers

migrate system ntp entries to NTPServer

ntp: split server and options into several fields
(hide it for now)

several changes to the treemenu so we can support hook of plugin items

- change attribute of url path to pen from "view" to "url"
- change the gname attribute so it is autogenerated from the position of the tree
- e.g. UPS node under Services is called "services.UPS"
- add a simple method to catch new items from an url (plugin)
- the url must return a JSON array containing nodes for the tree
- the node can be appended anywhere in the tree:
- e.g. "append_to": "services.Rsync.RsyncMod" will append it to Rsync Modules node
- split auto_generate in two
- prepare_modelforms go through all the models and find all related modelforms
- generate actually generate the menu structures to dump as JSON later on

Follow up r8093 by correcting the grammar for "Sysctls".

GUI bits for loader.conf entries

GUI part for sysctl stuff