Design tweaks to add-story-button hover

ts/components/StoriesAddStoryButton.tsx

@@ -19,6 +19,7 @@ export type PropsType = {
   i18n: LocalizerType;
   moduleClassName?: string;
   onAddStory: (file?: File) => unknown;
+  onContextMenuShowingChanged?: (value: boolean) => void;
   showToast: ShowToastActionCreatorType;
 };
 
@@ -28,11 +29,13 @@ export const StoriesAddStoryButton = ({
   moduleClassName,
   onAddStory,
   showToast,
+  onContextMenuShowingChanged,
 }: PropsType): JSX.Element => {
   return (
     <ContextMenu
       ariaLabel={i18n('Stories__add')}
       i18n={i18n}
+      onMenuShowingChanged={onContextMenuShowingChanged}
       menuOptions={[
         {
           label: i18n('Stories__add-story--media'),