Make new dropdown dividers full width

app/assets/stylesheets/framework/dropdowns.scss

@@ -726,7 +726,12 @@
 
 // TODO: change global style and remove mixin
 @mixin new-style-dropdown {
-  .dropdown-menu {
+  .dropdown-menu,
+  .dropdown-menu-nav {
+    .divider {
+      margin: 6px 0;
+    }
+
     li {
       padding: 0 1px;
 

app/assets/stylesheets/new_nav.scss

@@ -309,6 +309,29 @@ header.navbar-gitlab-new {
       outline: 0;
     }
   }
+
+  // TODO: fallback to global style
+  .dropdown-menu {
+    .divider {
+      margin: 6px 0;
+    }
+
+    li {
+      padding: 0 1px;
+
+      a {
+        border-radius: 0;
+        padding: 8px 16px;
+
+        &.is-focused,
+        &:hover,
+        &:active,
+        &:focus {
+          background-color: $gray-darker;
+        }
+      }
+    }
+  }
 }
 
 .breadcrumbs-container {