Merge commit '610cf6c3713e414995ea1a57110db400ccb88dd2' into glitch-soc/merge-upstream

Conflicts:
- `app/models/trends.rb`:
  Conflict due to glitch-soc's code splitting trends mailing depending on type.
  Ported upstream's changes.

app/javascript/mastodon/locales/en.json

@@ -618,6 +618,8 @@
   "status.history.created": "{name} created {date}",
   "status.history.edited": "{name} edited {date}",
   "status.load_more": "Load more",
+  "status.media.open": "Click to open",
+  "status.media.show": "Click to show",
   "status.media_hidden": "Media hidden",
   "status.mention": "Mention @{name}",
   "status.more": "More",
@@ -648,7 +650,7 @@
   "status.title.with_attachments": "{user} posted {attachmentCount, plural, one {an attachment} other {{attachmentCount} attachments}}",
   "status.translate": "Translate",
   "status.translated_from_with": "Translated from {lang} using {provider}",
-  "status.uncached_media_warning": "Not available",
+  "status.uncached_media_warning": "Preview not available",
   "status.unmute_conversation": "Unmute conversation",
   "status.unpin": "Unpin from profile",
   "subscribed_languages.lead": "Only posts in selected languages will appear on your home and list timelines after the change. Select none to receive posts in all languages.",