fixes #18010 - UI Notifications front-end implementation

Fixes #18127 - Correcting length of group base field

Fixes #17844 - unify test mail js code

Fixes #6502 - List ignored classes and environments on import

When importing environments and classes from puppet, ignored
environments and classes defined in ignored_environments.yml
aren't aparent.

This will add them to the list to import as ignored and...

Fixes #18085 - Update 'Build PXE Default' to secondary style

Each page should have one clear call to action, so update the
Build-PXE-Default button to secondary button style

Fixes #17653 - Allow all parameters api to unhide values

Fixes #15405 - Moved puppet UI to helpers

Fixes #14714 - Make inherited Puppet Classes more apparent

To better recognize which Puppet Classes are inherited for Host
or Hostgroup they are under a sub-heading as a seperated list.

refs #18031 - change Admin field string in PO, remove new string

Fixes #4519, #9531 - Correctly handle invalid host name changes

Removing a host name or otherwise changing it to an invalid name (such
as a name containing /) caused the form to fail loading. This makes sure
all paths are generated correctly and validation error is shown.