Include the ability to add groups to NI Auth in the system web server (localhost:3580)

[smithd]

At present, we can add users and permissions to NI auth in the system web server, but we cannot add groups.

There is no particular reason for this, as the help clearly implies that there should be a way to add groups:

If you ever want to add users that have more than four sets of permissions, you will start having to manually adjust those settings, which shouldn't be the case. We should be able to add groups, to prevent just this issue.

[Darren]

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