Fixes #19506 - reset cache after CR update

Fixes #19173 - build notification succeeds with expired token.

refs #19317 - move FiltersHelperOverrides to app/registries/

Uses class to hold state, should be kept in the autoload_once registry
directory.

Fixes #19504 - Quote puppet class filter in host form

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

Fixes #19384 - Add tooltip to the Remove Matcher button

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...

fixes #19483 - use #admin? method to check inherited admin flags

Fixes #18995, #18996 - visible_environments works w/o taxonomies

fixes #19476 - list features in smart proxy refresh API response

templates - sync from community-templates