Fix primary nav background color on gray background (#4079)

On the desktop view, esp. for applicant the top nav shows a white
background.

This fixes and applies the nav bg only when the mobile menu is active

hypha/core/templates/core/navigation/primarynav-apply.html

@@ -9,7 +9,7 @@
     x-transition:leave="transition ease-in duration-150"
     x-transition:leave-start="transform opacity-100 translate-x-0"
     x-transition:leave-end="transform opacity-0 translate-x-full"
-    class="fixed md:static pt-10 md:pt-0 top-0 md:top-auto end-0 bottom-0 bg-white z-20 md:z-10 shadow-xl md:shadow-none overflow-y-auto md:overflow-clip"
+    class="fixed md:static pt-10 md:pt-0 top-0 md:top-auto end-0 bottom-0 bg-white md:bg-transparent z-20 md:z-10 shadow-xl md:shadow-none overflow-y-auto md:overflow-clip"
 >
     <!-- Mobile Menu Opener -->
     <button