white background for help dropdown on landing

app/styles/app.scss

@@ -19,7 +19,7 @@
 // @import "app/left";
 @import "app/loading";
 @import "app/main/annotations";
-@import "app/landing";
+
 @import "app/main/list";
 @import "app/main/log";
 @import "app/main/sponsors";
@@ -66,3 +66,5 @@
 @import "app/layouts/profile";
 @import "app/layouts/top";
 // @import "app/top";
+
+@import "app/landing";

app/styles/app/landing.sass

@@ -489,3 +489,6 @@
     &:hover
       text-decoration: underline
 
+.landing-page
+  .navigation-nested
+    background-color: $white