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- Comment list is initially three comments long
- Tapping "Load 10 more comments" extends the current list by 10 comments
- See "Guidelines... for list extensionelement expansion/contraction" for interaction behavior with the extension button
- Number of comments loaded should persist between collapse and re-expansions, until the user leaves the current artifact (i.e., if 23 comments were loaded, collapsing and re-expanding the panel should display the same 23 comments; if the user leaves the current artifact, and re-visits even in the current session, only the initial 3 comments should be visible)
- "Current artifact" consists of the default artifact screen and its elements, the full screen artifact image view, and the related artifacts view
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