We need to document how replication "naming schemas" widget works. It is not clear now that we can enter multiple naming schemas and how can we do that.

(reported by Justin Pennington here https://jira.ixsystems.com/browse/NAS-107822?focusedCommentId=118480&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-118480)