Fixes #18469 - Add Patternfly empty page for subnets

Fixes #18473 - Add Patternfly empty page for compute resources

Fixes #18474 - Add Patternfly empty page for OSs

Fixes #18462 - Change LDAP filter field to text area

Fixes #18461 - reword 'External groups'

fixes #18248 - dashboard auto refresh mounts duplicate components

Fixes #18412 - Alert styling for adrift host time

The alert for hosts time adrift on reports has the styling we had prior
to Patternfly. It should use the new styling.

Fixes #18367 - Add patternfly welcome to user groups index

Fixes #18433 - Remove the Data not available message

This is causing confusion, as it appears to infer an error state

Fixes #12652 - VMware Volume name is readonly