Fix unslick missing children element

[monthas]

1. When set unslick the children element went missing so use variable children to render from given children instead of newChildren.

Before

2. Change div to span because it fixed element doesn't load properly on the breakpoint that set unslick (Don't know the root cause but it works like a charm.)

Before

After

Example settings

  var settings = {
      infinite: false,
      speed: 500,
      slidesToShow: 5,
      slidesToScroll: 1,
      responsive: [
        {
          breakpoint: 480,
          settings: {
            centerMode: true,
            slidesToShow: 2,
            slidesToScroll: 1,
            infinite: true
          },
        }, {
          breakpoint: 10000,
          settings: 'unslick'
        }
      ]
  }