Fixes #19583 - reworded blank label for subnet

fixes #14699 - Enable host edit to accept new params

Prior to this commit:
Foreman plugins like Katello/Discovery extended the Host edit page
and added fields of their own.
For example
Katello adds things like Content Views, enviroments etc.

However they were unable to get their attibutes passed to the backend...

Fixes #19504 - Quote puppet class filter in host form

So that the filter can contain characters such as ":"

fixes #19479, #10587, #19500 - two pane notifications are visible

- notification is now inside the content div, allowing two-pane server
responses to include it.
- refactored all notifications to use notification helpers (notice,
warning and error) instead of direct flash manipulation...

i18n - extracting new, pulling from tx

fixes #14178 - Introduce patternfly toast notifications

fixes #14178 - introduce patternfly toast notifications

- replaces old jnoitfy with react implementation.
- Adds a notification store to handle events from
rails flash + legacy javascript Notice function and expose
an Action API to add notifications.

Fixes #19365 - display loading spinner instead of text

Fixes #19176 - fix translated strings in select all hosts

Fixes #19309 - Only select first hosts page on select all (#4467)