Add help descriptions to user settings

[noerw]

It's hard to understand for admins what some user settings like restricted, active, disable-signin mean, and how they interact.
Adding helper descriptions to /admin/users/:id similar to #14591 would be very helpful

[wULLSnpAXbWZGYDYyhWTKKspEQoaYxXyhoisqHf]

it's hard to understand what some settings mean

I second this in that certain fields could definitely use a little tooltip 🚀