PLT-4257 Add pop-up asking if user wants to reset status (#6526)

* Add pop-up asking if user wants to reset status

* Update test snapshot

* Update prop name for old uses of confirm modal

* Updating checkbox (#6586)

* Updating style for checkbox (#6596)

webapp/components/create_post.jsx

@@ -120,7 +120,9 @@ export default class CreatePost extends React.Component {
     }
 
     doSubmit(e) {
-        e.preventDefault();
+        if (e) {
+            e.preventDefault();
+        }
 
         const post = {};
         post.file_ids = [];