babycode editor: change ctrl+enter shortcut to use requestSubmit to fire bitty signals

data/static/js/bits/ui.js

@@ -114,6 +114,7 @@ export function babycodeEditorCharCount(evOrPayload, sender, el) {
 
 export function clearThreadDraft(_, __, ___) {
   const threadId = getThreadId();
+  if (threadId === -1) return;
   localStorage.removeItem(`thread-${threadId}`);
 }