Fix navigation: close open dropdown on click of toggle item. Dropdown…

… would always stay open before.

Signed-off-by: David Edler <david.edler@canonical.com>

templates/docs/examples/patterns/navigation/_script.js

@@ -37,8 +37,9 @@ function initNavDropdowns(containerClass) {
     toggle.addEventListener('click', function (e) {
       e.preventDefault();
 
+      const shouldOpen = !toggle.parentNode.classList.contains('is-active');
       closeAllDropdowns(toggles);
-      toggleDropdown(toggle, true);
+      toggleDropdown(toggle, shouldOpen);
     });
   });
 }