[Glitch] Fix empty display name precedence over username in web UI

Port 4084814d8a to glitch-soc

app/javascript/flavours/glitch/reducers/accounts.js

@@ -72,7 +72,7 @@ const normalizeAccount = (state, account) => {
   delete account.statuses_count;
 
   const emojiMap = makeEmojiMap(account);
-  const displayName = account.display_name.length === 0 ? account.username : account.display_name;
+  const displayName = account.display_name.trim().length === 0 ? account.username : account.display_name;
   account.display_name_html = emojify(escapeTextContentForBrowser(displayName), emojiMap);
   account.note_emojified = emojify(account.note, emojiMap);