Merge pull request #15018 from twbs/fix-theme-active-items

Theme: Correctly override active dropdown items in collapsed navbars

less/theme.less

@@ -151,6 +151,18 @@
   border-radius: 0;
 }
 
+// Fix active state of dropdown items in collapsed mode
+@media (max-width: @grid-float-breakpoint-max) {
+  .navbar .navbar-nav .open .dropdown-menu > .active > a {
+    &,
+    &:hover,
+    &:focus {
+      color: #fff;
+      #gradient > .vertical(@start-color: @dropdown-link-active-bg; @end-color: darken(@dropdown-link-active-bg, 5%));
+    }
+  }
+}
+
 
 //
 // Alerts