FreeNAS Code

Default value for iSCSI LUC network needed to be changed in migration as well

Reported-by: dlavigne

Loopback address should not be listed in the iSCSI Portal form

Set MTU back to 1500 in case it was removed

Looks like dojo.hitch was not doing the right thing to destroy dialogs

This should fix a lot of strange behavior in the GUI related to
dialogs, including:
- Funky volume manager
- Tooltips not showing up in the second time for same dialog

python-pep8 test

Use editable atribute for builtin users/groups

While I'm here do some PEP8

Take leverage of editable option in django models

It excludes the fields by default from ModelForm.
This is useful for fields that shouldn' be exposed in the UI

Previous commit wasn't fully vetted for PEP8 compliance and for the most part was unnecessary (vimdiff was showing more context changes and I was a bit hasty with the commit hammer).

Requested-by: zippybr

Move code around so it conflicts less when importing into the iX repo.

Do-Not-Merge: in effect in iX repo.

Default mode for advanced fields needed to be exposed to template