Clicked button not available

[norkunas]

I'm using:

        $this->browser()
            ->get("/url-to-form")
            ->assertSuccessful()
            ->fillField('form[field]', 'value')
            ->click('Submit')

But in the controller $form->getClickedButton() is always null.
Sure I could fake and do ->post(...) directly with required data, but that's against my goal