LibWeb: Fix that $0 was no longer accessible

We now set the realm (twice) on every console input. This can probably
be avoided if we use two executing contexts one for the website the
other for the console.
This achieves a similar behavior but is not really nice and not really
spec like.

Userland/Services/WebContent/WebContentConsoleClient.cpp

@@ -39,7 +39,16 @@ void WebContentConsoleClient::handle_input(String const& js_source)
  output_html.append(String::formatted("<pre>{}</pre>", escape_html_entities(hint)));
  m_interpreter->vm().throw_exception<JS::SyntaxError>(*m_console_global_object.cell(), error.to_string());
  } else {
+ // FIXME: This is not the correct way to do this, we probably want to have
+ // multiple execution contexts we switch between.
+ auto& global_object_before = m_interpreter->realm().global_object();
+ VERIFY(is<Web::Bindings::WindowObject>(global_object_before));
+ auto& this_value_before = m_interpreter->realm().global_environment().global_this_value();
+ m_interpreter->realm().set_global_object(*m_console_global_object.cell(), &global_object_before);
+
  m_interpreter->run(*m_console_global_object.cell(), *program);
+
+ m_interpreter->realm().set_global_object(global_object_before, &this_value_before);
  }
 
  if (m_interpreter->exception()) {