Javascript test for widget

#5 was needed because I forgot the @group annotation.

I spent a big part of yesterday having another look at this, and I can't figure out why there the widget doesn't display links. I really don't know. I did figure out we don't need as many modules installed, changed that.

I figured it out! We needed to add the url_processor_handler processor to the facet for it to work. Test should be green now, woo.

It looks like there's still something wrong with the js though, I'll try to figure that out now.

This also means that this test needs to be expanded.

I expanded the test, this is now looking quite good already. I did see that nothing happens when selecting a checkbox, attached screenshot from inside the test.

Because I don't think the code to take a screenshot should end up on the test-infrastructure, I'll paste it here if someone wants to see what happens.

    $this->getSession()->executeScript('document.body.style.backgroundColor = "#fff";');
    $shot = $this->getSession()->getScreenshot();
    file_put_contents('screenshot.jpg', $shot);

Thanks @StryKaizer, that helped!

Spoke with some testing wizards at dev days, they suggested some improvements for this test. If the bot agrees, I think we can commit this.

I did look at getting that from the href, but there was a problem with the encoding being different and even with url encoding both I couldn't get them to match up.