Add functionality to stop all audio and video when moving to next element/block

[mldaq]

Audio and video keeps playing when you move to the next block if pause or stop is not clicked. I added the following code to (adapt-contrib-blockslider.js) my own version of this extension and it seemed to do the trick:

In the navigateClick: function (event) and navigateTab: function (event) -

//Added to stop all videos and audio on click
$('video,audio').each(function() {
$(this)[0].pause();
});

Not sure if we want to consider this in the extension. This only works for the media component - looking for solution with iframe.

@oliverfoster - not sure the process here - so if you could take a look