[MM-53430] Don't stop the isDraftSubmitting flow when the notification modal is popped (#23962)

* [MM-53430] Don't stop the `isDraftSubmitting` flow when the notification modal is popped

* Reset to false if the modal closes without confirming

webapp/channels/src/components/advanced_create_comment/advanced_create_comment.tsx

@@ -475,6 +475,9 @@ class AdvancedCreateComment extends React.PureComponent<Props, State> {
                 channelTimezoneCount,
                 memberNotifyCount,
                 onConfirm: () => this.handleNotifyAllConfirmation(),
+                onExited: () => {
+                    this.isDraftSubmitting = false;
+                },
             },
         });
     };
@@ -650,7 +653,6 @@ class AdvancedCreateComment extends React.PureComponent<Props, State> {
 
         if (memberNotifyCount > 0) {
             this.showNotifyAllModal(mentions, channelTimezoneCount, memberNotifyCount);
-            this.isDraftSubmitting = false;
             return;
         }
 

webapp/channels/src/components/advanced_create_post/advanced_create_post.tsx

@@ -585,6 +585,9 @@ class AdvancedCreatePost extends React.PureComponent<Props, State> {
                 channelTimezoneCount,
                 memberNotifyCount,
                 onConfirm: () => this.handleNotifyAllConfirmation(),
+                onExited: () => {
+                    this.isDraftSubmitting = false;
+                },
             },
         });
     };
@@ -689,7 +692,6 @@ class AdvancedCreatePost extends React.PureComponent<Props, State> {
             return;
         } else if (memberNotifyCount > 0) {
             this.showNotifyAllModal(mentions, channelTimezoneCount, memberNotifyCount);
-            this.isDraftSubmitting = false;
             return;
         }