Rework operator and disabled flags

For now our hardware objects are handled this way

• operator = operator and !runningScanid
• disabled = !operator or !hardware.online

As result an operator is no more "operator" when a scan is running.

It would be good to try to decouple this flags

The first step we could do is

• operator = operator
• disabled = !operator or runningScanid or !hardware.online

This would let us use the operator flag while the component will stay disabled.

We could imagine to rework the disabled flag later.