Update Options dialog layout in WebUI

src/webui/www/private/preferences_content.html

@@ -437,7 +437,6 @@
             </div>
             <div style="padding-left: 10px;"><a target="_blank" href="https://httpd.apache.org/docs/current/ssl/ssl_faq.html#aboutcerts">QBT_TR(Information about certificates)QBT_TR[CONTEXT=HttpServer]</a></div>
         </fieldset>
-    </fieldset>
 
         <fieldset class="settings">
             <legend>QBT_TR(Authentication)QBT_TR[CONTEXT=OptionsDialog]</legend>
@@ -459,6 +458,7 @@
                 <textarea id="bypass_auth_subnet_whitelist_textarea" rows="5" cols="48" placeholder="Example: 172.17.32.0/24, fdff:ffff:c8::/40"></textarea>
             </div>
         </fieldset>
+    </fieldset>
 
     <fieldset class="settings">
         <legend><input type="checkbox" id="use_dyndns_checkbox" onclick="updateDynDnsSettings();" />