If you use `f:radioBlock` with multiple radio buttons
and you have an `f:validateButton` where you want the value of the radio button submitted

The value of the radio button that is submitted in the form submission is always the last radio button and not the selected one.

Noticed in https://github.com/jenkinsci/azure-vm-agents-plugin/pull/493, but comments in the code point to workarounds being put in place for it from at least 2.60.