Hi Niall, thank you for a fast reply!
I see, then I will name it in a different way. Now I only wonder how I can get a hold of the hidden block and change the class (since it’s not showing in the GUI). Any idea? I tried to override the .hidden default styling by setting display:block !important but that way it only appeared on the site and not in the GUI editor. This feels like a bug, even if I add the .hidden class it should still be showing in the editor right?