LibWeb: Allow all elements with tabindex attribute to be focusable

Author: https://github.com/lpas
Commit: 3bc061d028
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6780
Reviewed-by: https://github.com/gmta ✅

Libraries/LibWeb/HTML/HTMLElement.cpp

@@ -149,7 +149,7 @@ void HTMLElement::set_dir(String const& dir)
 
 bool HTMLElement::is_focusable() const
 {
-    return is_editing_host() || get_attribute(HTML::AttributeNames::tabindex).has_value();
+    return Base::is_focusable() || is_editing_host();
 }
 
 // https://html.spec.whatwg.org/multipage/interaction.html#dom-iscontenteditable