Recently we introduced a new `PostList` component (d886c55f63). In this update, we make broader adoption of this component. In particular, these areas include using the new component in the user activity stream pages, user's deleted posts, and pending posts page. This update also takes the existing `posts` route and adds a barebones front-end for it to view posts all in one page.
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Co-authored-by: David Taylor <david@taylorhq.com>
This reduces chances of errors where consumers of strings mutate inputs
and reduces memory usage of the app.
Test suite passes now, but there may be some stuff left, so we will run
a few sites on a branch prior to merging
