[Glitch] Fix 'focus the compose textarea' shortcut is not working

Port 3c315a68af to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/features/ui/index.jsx

@@ -483,7 +483,7 @@ class UI extends PureComponent {
   handleHotkeyNew = e => {
     e.preventDefault();
 
-    const element = this.node.querySelector('.compose-form__autosuggest-wrapper textarea');
+    const element = this.node.querySelector('.autosuggest-textarea__textarea');
 
     if (element) {
       element.focus();