Use one instance of language settings detail menu for all languages

chrome/browser/resources/settings/settings_shared_css.html

Index: chrome/browser/resources/settings/settings_shared_css.html
diff --git a/chrome/browser/resources/settings/settings_shared_css.html b/chrome/browser/resources/settings/settings_shared_css.html
index bb9e289d5a43511ecc577540495c76ac842dcb5a..fe948f7df3a0498323213c3ab85c03ec9356b50e 100644
--- a/chrome/browser/resources/settings/settings_shared_css.html
+++ b/chrome/browser/resources/settings/settings_shared_css.html
@@ -48,7 +48,8 @@
       }
 
       iron-dropdown .dropdown-item,
-      paper-dropdown-menu .dropdown-item {
+      paper-dropdown-menu .dropdown-item,
+      cr-shared-menu .dropdown-item {
         align-items: center;
         background: none;
         border: none;
@@ -76,11 +77,13 @@
       }
 
       iron-dropdown .dropdown-content .dropdown-item:not([disabled]),
+      cr-shared-menu .dropdown-item:not([disabled]),
       iron-dropdown .dropdown-content paper-item {
         @apply(--settings-actionable);
       }
 
-      iron-dropdown .dropdown-content .dropdown-item[disabled] {
+      iron-dropdown .dropdown-content .dropdown-item[disabled],
+      cr-shared-menu .dropdown-item[disabled] {
         opacity: var(--settings-disabled-opacity);
       }