DiscussionLayout:A discussion with short comments

Build 9759 on marji/fix-fetch-mock-issue
1200px
Reviewing disabled
The baseline is shorter than the new snapshot (1300x726 to 1300x882).
Baseline History
Build 9759f411246
Current build. There are unaccepted changes, so build 7480 is still the baseline.
Build 71661645216
Accepted by Daniel Clifton.
Build 6911da3a439
Accepted by Anna Beddow.
Build 6787db61566
Accepted by Charlotte Emms.
Commenting is disabled because there's a newer build on this branch