added multiline append

templates/items_append.html

@@ -77,6 +77,17 @@ $(document).ready(function(){
   </tbody>
 </table>
 
+<br/>
+
+<form method="post" action="/items_multiappend/{{ listid }}">
+    <div class=".container">
+    <div class="d-flex justify-content-between">
+        <textarea class="form-control" id="myInput" rows="4" name="newItems" placeholder="many items..."></textarea>
+        &nbsp;
+        <button class="btn btn-secondary">+</button>
+    </div>
+    </div>
+</form>
 
 <!-- Modal -->
 <div class="modal fade" id="staticBackdrop" data-bs-backdrop="static" data-bs-keyboard="false" tabindex="-1" aria-labelledby="staticBackdropLabel" aria-hidden="true">