[FIX] website: restore scrollbar for some menus

After [1], the dropdown menu of the main navbar for some menus
(e.g customize on /shop) didn't have scrollbars anymore, making it hard
to navigate on smaller resolution devices.

This commit restores that.

[1]: https://github.com/odoo/odoo/commit/1971bf39810468b2b67e2ecd3c86c663d5cffcfd

task-2670809

X-original-commit: b46d2ad7c6b225ae34594991d5189672b95fc3cc
Part-of: odoo/odoo#80466

addons/website/static/src/scss/website.ui.scss

@@ -96,14 +96,13 @@ body.o_connected_user {
         font-size: inherit;
         border-radius: 0;
         color: $dropdown-link-active-color;
+        max-height: 500px; // Fallback
+        max-height: calc(90vh - #{$o-navbar-height});
+        overflow: auto;
     }
     #oe_applications .dropdown-menu {
         // Compensate #oe_applications's padding
         margin-left: $dropdown-item-padding-x * -0.5;
-
-        max-height: 500px; // Fallback
-        max-height: calc(90vh - #{$o-navbar-height});
-        overflow: auto;
     }
 
     .o_menu_sections {