Issue #811542 by bojanz, sun, mlncn, chx, pillarsdotnet, loganfsmyth, xjm: Fixed Regression: Required radios throw illegal choice error when none selected.
Merge pull request #148 from jenlampton/135-meta3-jen5

Issue #811542 by bojanz, sun, mlncn, chx, pillarsdotnet, loganfsmyth, xjm: Fixed Regression: Required radios throw illegal choice error when none selected.