Fix media descriptions not being used for client-side filtering (#17206)

Fix oversight in #13837

app/javascript/mastodon/actions/importer/normalizer.js

@@ -71,7 +71,7 @@ export function normalizeStatus(status, normalOldStatus) {
     }
 
     const spoilerText   = normalStatus.spoiler_text || '';
-    const searchContent = ([spoilerText, status.content].concat((status.poll && status.poll.options) ? status.poll.options.map(option => option.title) : [])).join('\n\n').replace(/<br\s*\/?>/g, '\n').replace(/<\/p><p>/g, '\n\n');
+    const searchContent = ([spoilerText, status.content].concat((status.poll && status.poll.options) ? status.poll.options.map(option => option.title) : [])).concat(status.media_attachments.map(att => att.description)).join('\n\n').replace(/<br\s*\/?>/g, '\n').replace(/<\/p><p>/g, '\n\n');
     const emojiMap      = makeEmojiMap(normalStatus);
 
     normalStatus.search_index = domParser.parseFromString(searchContent, 'text/html').documentElement.textContent;