Implement error recovery for radio buttons: clicking on a selected radio button should unselect it

[LeaVerou]

One of @michaelquiapos’s points was that radio buttons do not provide any way for error recovery out of the box: once you’ve selected a radio button, you can only select a different one in the group, but you cannot clear the selection entirely.

An unobtrusive way to facilitate error recovery without cluttering the UI is to implement that if a user clicks on a selected radio button, that unselects it (like a checkbox).

This could likely be implemented in a generic way, for all radio buttons.

[SachaG]

Good idea!

[SachaG]

Done.