Join:with some of the children empty

Build 1240 on dzucconi/chore/storybook-upgrade
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Reviewing disabled
The baseline is wider than the new snapshot (1210x335 to 1178x335).
Baseline History
Build 1240864b19e
Current build. There are unaccepted changes, so build 450 is still the baseline.
Build 4480129882
Accepted by Kieran.
Build 109a7fb251
Accepted by Oksana.
Build 107f341790
Accepted by Oksana.
Commenting is disabled because there's a newer build on this branch