Improvements to toots display in admin view (#7452)

* Distinguish boosts from original statuses in the admin panel (fixes #7449)

* Show the “show more” button in admin view to make CWs clearer (fixes #7451)

* Make content warnings swag

config/locales/en.yml

@@ -682,6 +682,7 @@ en:
       video:
         one: "%{count} video"
         other: "%{count} videos"
+    boosted_from_html: Boosted from %{acct_link}
     content_warning: 'Content warning: %{warning}'
     disallowed_hashtags:
       one: 'contained a disallowed hashtag: %{tags}'