RadioGroup:With default value

Build 1283 on dzucconi/fix/radio-a11y
1200px
Reviewing disabled
The baseline is shorter than the new snapshot (1168x101 to 1168x103).
Baseline History
Build 1283cfc7346 current baseline
Current build. Accepted by Damon.
Build 12820f1cb12
Accepted by Damon.
Build 1241e5a64b5
Accepted by Damon.
Build 450b70bff7
Auto-accepted
Build 4480129882
Accepted by Kieran.
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