Added dynamic submenus

app/static/css/default.css

@@ -105,4 +105,12 @@ h3.footer-title{
   top: 0;
   left: 100%; /* Positioniert das Submenü rechts vom Hauptmenü */
   margin-top: -1px;
+}
+
+.dropdown-menu.collapse {
+  display: none;
+}
+
+.dropdown-menu.collapse.show {
+  display: block;
 }