Fix input activation behavior tests to test connected inputs

HTML requires the inputs be connected to fire input and change events
diff --git a/dom/events/Event-dispatch-click.html b/dom/events/Event-dispatch-click.html
index a92bde1..0103057 100644
--- a/dom/events/Event-dispatch-click.html
+++ b/dom/events/Event-dispatch-click.html
@@ -301,6 +301,7 @@
         assert_equals(input.checked, true);
         t.done();
       });
+      dump.append(input);
       input.click();
     }, `disabling ${type} in onclick listener shouldn't suppress ${handler}`);
   }