message: Add some small fix-ups to FolderConfig
diff: /**
  * Edit a folder, configuring its name and appearance
  */
  -declare class FolderConfig extends FormApplication<FolderConfig.Data, Folder.Data> {
  +declare class FolderConfig extends FormApplication<FolderConfig.Data, Folder> {
  /**
  * @override
  */
  @@ -18,6 +18,7 @@ declare class FolderConfig extends FormApplication<FolderConfig.Data, Folder.Dat
  get title(): string;
  /**
  + * @param options - (unused)
  * @override
  */
  getData(options?: Application.RenderOptions): Promise<FolderConfig.Data>;
  