Cannot edit single image carousel gallery

If you have a github repo, I’d like to contribute the bug fix. Anyway, here it is:

For sinlge image, if there is a single image, say 1234, then ids will be treated as integer isntead of a string, which will cause javascript errors later and people cannot click edit button. To solve it, parse images variable to string.

assets/js/admin.js: Around line 412

    function loadImages(images) {
        if (images) {
            var shortcode = new wp.shortcode({
                tag: 'gallery',
                attrs: {ids: String(images)},
                type: 'single'
            });