This adds "Show thread" button to the status view which is used in
profiles. The logic to display the button is mimicking logic in
web app available at app/javascript/mastodon/components/status.js#L439.
* The little change in components CSS required to remove enforced
underline for all links on public pages on our button.
Also:
- Fix Mastodon logo not showing up in status embeds
- Fix blurhash not being used in status embeds
- Fix blurhash not being used in admin UI
- Fix autoplay param not working correctly on status embeds
