Adds gallery / carousel for app images

assets/splide/css/splide-core.min.css

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+@keyframes splide-loading{0%{transform:rotate(0)}to{transform:rotate(1turn)}}.splide__track--draggable{-webkit-touch-callout:none;-webkit-user-select:none;-ms-user-select:none;user-select:none}.splide__track--fade>.splide__list{display:block}.splide__track--fade>.splide__list>.splide__slide{left:0;opacity:0;position:absolute;top:0;z-index:0}.splide__track--fade>.splide__list>.splide__slide.is-active{opacity:1;position:relative;z-index:1}.splide--rtl{direction:rtl}.splide__track--ttb>.splide__list{display:block}.splide__container{box-sizing:border-box;position:relative}.splide__list{-webkit-backface-visibility:hidden;backface-visibility:hidden;display:-ms-flexbox;display:flex;height:100%;margin:0!important;padding:0!important}.splide.is-initialized:not(.is-active) .splide__list{display:block}.splide__pagination{-ms-flex-align:center;align-items:center;display:-ms-flexbox;display:flex;-ms-flex-wrap:wrap;flex-wrap:wrap;-ms-flex-pack:center;justify-content:center;margin:0;pointer-events:none}.splide__pagination li{display:inline-block;line-height:1;list-style-type:none;margin:0;pointer-events:auto}.splide__progress__bar{width:0}.splide{position:relative;visibility:hidden}.splide.is-initialized,.splide.is-rendered{visibility:visible}.splide__slide{-webkit-backface-visibility:hidden;backface-visibility:hidden;box-sizing:border-box;-ms-flex-negative:0;flex-shrink:0;list-style-type:none!important;margin:0;position:relative}.splide__slide img{vertical-align:bottom}.splide__spinner{animation:splide-loading 1s linear infinite;border:2px solid #999;border-left-color:transparent;border-radius:50%;bottom:0;contain:strict;display:inline-block;height:20px;left:0;margin:auto;position:absolute;right:0;top:0;width:20px}.splide__sr{clip:rect(0 0 0 0);border:0;height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px}.splide__toggle.is-active .splide__toggle__play,.splide__toggle__pause{display:none}.splide__toggle.is-active .splide__toggle__pause{display:inline}.splide__track{overflow:hidden;position:relative;z-index:0}