Add the posibility to disable some radio options in a Radiobutton group

Problem/Motivation

In some cases it would be usefull to disable some options of a radio group without deleting the item. Currently there is an option to disable the whole element only.
I had a simple usecase when in an event registration form there is a radio group for the hotel selection for the event. If one Hotel is full then I would like to disable it (not to delete it because then the already registred values are lost).

Proposed resolution

It would be simple to add a checkbox (enabled/disabled) to every options pair on element creation page.