DiscussionLayout:A discussion with short comments

Build 2884 on mxdvl/crop-sublinks-mobile
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Baseline History
Build 28846b9265a
Current build. There are unaccepted changes, so build 2879 is still the baseline.
Build 286684b5c12
Auto-accepted
Build 2864920b0fc
Accepted by James Gorrie.
Build 284009e1ddf
Accepted by Max Duval.
Commenting is disabled because there's a newer build on this branch