[BUG] catch errors in JS

[DavidBruchmann]

Some feed entries are not loaded completely (i.e. if the image signature is expired) and trow js-errors then.
Therefore it's useful to catch those errors in socialFeed.js:

    if ($('.social-feed-container.owl-carousel').hasOwnProperty('owlCarousel')) {
        $('.social-feed-container.owl-carousel').owlCarousel(defaultOwlOptions);
    }

    if ($('.social-feed-container.masonry').hasOwnProperty('masonry')) {
        $('.social-feed-container.masonry').masonry({
            itemSelector: '.social-feed-item',
        }).imagesLoaded(function() {
            $('.social-feed-container.masonry').masonry({
                itemSelector: '.social-feed-item',
            });
        });
    }

    if ($('.social-feed-container .social-feed-title, .social-feed-container .social-feed-message').hasOwnProperty('dotdotdot')) {
        $('.social-feed-container .social-feed-title, .social-feed-container .social-feed-message').dotdotdot({
            watch: true
        });
    }