I am trying to add custom buttons to the login page using the manuallogin.html file, so far i have added:  <a is="emby-linkbutton" href="https://google.com" target="_blank" type="button" class="raised block btnSelectServer"> <span>Whatever Button</span> </a> but when I save the changes and restart the docker container, there is no changes to the Login screen, Is this still the way to add custom buttons? As most of the previous pos