New feature - Change user type (site level permission) via the UI

The list of Site Level permissions needs to be rationalised to only allow selection of values that actually affect the user’s permissions. Ideally the Super User or above should be able to change this selection via the UI without needing to raise a support ticket.

This can be moved to https://reachback.builtintelligence.com/c/built-intelligence-roadmap/released/ as the feature is now live.