Modularized notification toast and menu components.

modules/menus/notifications/notification/close/index.js

@@ -0,0 +1,12 @@
+export const CloseButton = (notif, notifs) => {
+  return Widget.Button({
+    class_name: "close-notification-button menu",
+    on_primary_click: () => {
+      notifs.CloseNotification(notif.id);
+    },
+    child: Widget.Label({
+      label: "󰅜",
+      hpack: "center",
+    }),
+  });
+};