create list interactivity

web/app.html

@@ -28,6 +28,7 @@
     <p>Create new list</p>
     <input id="listName" type="text" placeholder="name">
     <input id="listDescription" type="text" placeholder="description">
+    <button id="create_list_add" type="button">add</button>
     <button id="create_list_cancel" type="button">cancel</button>
     <p>Include items</p>
     <div id="checkbox-container"></div>