3438046-second level menu marked as active and expanded when level three item is active.

1. Second level menu marked as active.
2. Second level menu will be expanded if level three menu is active.

css/components/toolbar-button.css

@@ -71,6 +71,11 @@
   background-color: var(--admin-toolbar-color-gray-050);
 }
 
+.toolbar-menu__item--level-1:has(.is-active) .toolbar-button {
+  color: var(--admin-toolbar-color-gray-950);
+  background-color: var(--admin-toolbar-color-gray-050);
+}
+
 .toolbar-button--large {
   padding: var(--admin-toolbar-space-8) var(--admin-toolbar-space-16);
   font-size: var(--admin-toolbar-font-size-l);