LibWeb: Make the dblclick event bubble, cancelable and composed

Userland/Libraries/LibWeb/UIEvents/MouseEvent.cpp

@@ -77,7 +77,7 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<MouseEvent>> MouseEvent::create_from_platfo
 
 void MouseEvent::set_event_characteristics()
 {
-    if (type().is_one_of(EventNames::mousedown, EventNames::mousemove, EventNames::mouseout, EventNames::mouseover, EventNames::mouseup, HTML::EventNames::click)) {
+    if (type().is_one_of(EventNames::mousedown, EventNames::mousemove, EventNames::mouseout, EventNames::mouseover, EventNames::mouseup, HTML::EventNames::click, EventNames::dblclick)) {
         set_bubbles(true);
         set_cancelable(true);
         set_composed(true);