[Update] Change the notification UI.

(Change the base notification library from MUI to React-Toastify.)

src-ui/app/splash_component/SplashComponent.jsx

@@ -71,7 +71,7 @@ const AnnouncementsContainer = () => {
 };
 
 
-
+// Duplicated
 const CloseButtonContainer = () => {
     const { asyncCloseApp } = useWindow();
 

src-ui/app/splash_component/SplashComponent.module.scss

@@ -67,7 +67,7 @@
 }
 
 
-
+// Duplicated
 .close_button_wrapper {
     position: absolute;
     top: 0;