Fix closed input null ref set

Change to created date of first comment instead of last comment date

Author: Komediruzecki

src/cloud/components/Comments/CommentInput.tsx

@@ -94,10 +94,14 @@ function CommentInput({
     try {
       setWorking(true)
       await onSubmit(fromNode(inputRef.current).trim())
-      inputRef.current.innerHTML = ''
+      if (inputRef.current != null) {
+        inputRef.current.innerHTML = ''
+      }
     } finally {
       setWorking(false)
-      inputRef.current.focus()
+      if (inputRef.current != null) {
+        inputRef.current.focus()
+      }
     }
   }, [onSubmit])
 

src/cloud/components/Comments/ThreadItem.tsx

@@ -117,7 +117,7 @@ function ThreadItem({
             <div className={'thread__comment__line'}>
               <span>{thread.contributors[0].displayName}</span>
               <span className='thread__comment__line__date'>
-                {formatDate(thread.lastCommentTime)}
+                {formatDate(threadComments[0].createdAt)}
               </span>
               {editing ? (
                 <CommentInput