In 89d5674 the code was glimmerized and ActivityCell was introduced instead of the raw view.
The raw view had a tagName="div" but ActivityCell and ViewsCelldo not support that, they hard code a`. This resulted in invalid HTML.
To fix that issue, to avoid copying code into this component and to leverage the A11Y from core, the views and replies have been replaced by ViewsCell and RepliesCell, and a table has been introduced to make the <td> valid.
We also introduce connectors to get the icons right and hide the icons using CSS on non-topic-card topic lists.
PR here