adjust z-index

src/client/styles/scss/_navbar.scss

@@ -7,9 +7,15 @@
     padding: 0 1rem;
   }
 
-  .personal-dropdown > .dropdown-toggle::after {
-    // hide caret
-    content: none;
+  #personal-dropdown {
+    & > .dropdown-menu {
+      // Adjust to be on top of the growi subnavigation
+      z-index: $zindex-sticky + 10;
+    }
+    &::after {
+      // hide caret
+      content: none;
+    }
   }
 
   .nav-link {

src/server/views/layout/layout.html

@@ -114,7 +114,7 @@
             <i class="icon-question mr-2"></i><span class="d-none d-md-inline-block mr-2">{{ t('Help') }}</span><span class="text-muted small"><i class="icon-share-alt"></i></span>
           </a>
         </li>
-        <li id="personal-dropdown" class="nav-item dropdown"></li>
+        <li id="personal-dropdown" class="nav-item dropdown dropdown-toggle"></li>
         {% else %}
         <li id="login-user" class="nav-item"><a class="nav-link" href="/login">Login</a></li>
         {% endif %}