Slick carousel support

When I add carousel on page, I can't see the thumbnails.

I fixed it:

1) add the attached patch (slick support enabled and thumbnails refreshed after loading)
2) use attached configuration for gallery setup
3) use
.slick--thumbnail.slick--skin--asnavfor .slick__slide img { position: absolute; }
CSS code instead of relative position for thumbnails
4) clear the cache (drush cr)