only show the help button on desktop

static/style.css

@@ -170,3 +170,16 @@ textarea.parsley-error {
 .domain_detail_content {
     font-size: 15px;
 }
+
+/* Only show the help button on desktop */
+@media only screen and (max-width: 500px) {
+    #help-btn {
+        display: none;
+    }
+}
+
+@media only screen and (min-width: 500px) {
+    #help-btn {
+        display: flex;
+    }
+}

templates/header.html

@@ -77,7 +77,7 @@
         </div>
 
         {% if ZENDESK_ENABLED %}
-          <div class="dropdown nav-item d-flex align-items-center">
+          <div id="help-btn" class="dropdown nav-item align-items-center">
             <a href="#" class="dropdown-toggle" data-toggle="dropdown">Help</a>
             <div class="dropdown-menu dropdown-menu-left dropdown-menu-arrow">
               <div class="dropdown-item">