Fixes #17972 - Simplify new trend form js and helpers

Migrated the js to webpack as well.

Fixes #17330 - skip admin email if it's unknown

When admin user is being seeded the Setting might not exist at that
moment. We can't just create it with value, since the setting would
be invalid because of other attributes. Therefore we split settings
creation from the setting list so we could create it from seed too....

Fixes #17438 - Disable selecting IPv6 on import

Fixes #16782 - reset dhcp record cache after mac change

Fixes #17864 - Show smart proxy errors on unattended fail

If your proxy is has some error (like misconfigured sudoers, puppet not
available, etc...) and you try to boot a host through unattended
mode [1], the exception will not show up when you try to fetch the...

Fixes #17904 - Show tooltips for long proxy log messages

Fixes #17680 - templates_used host helper

templates_used contains the names of all of the provisioning templates
kickstart used during a host build. This allows users to be able to
show the name of a provisioning template during PXEBoot, for example

Fixes #15403 - moved puppet to a concern in hosts UI controller

Fixes #17913 - Remove deprecation message when loading ACE editor

Fixes #17910 - Quote strings for JQuery href attribute selector

When the attribute starts with an hash (#) the query can not be
parsed by JQquery, quoting them prevents that from happening.