Add image aspect ratio to prevent page jumps

CHDataManagement/Page Elements/ContentElements/Images/ImageGallery.swift

@@ -31,7 +31,8 @@ struct ImageGallery: HtmlProducer {
         let needsPagination = images.count > 1
 
         for image in images {
-            result += "<div class='swiper-slide'>"
+            let sizeText = image.image.getImageDimensions().map { " style='aspect-ratio: \(Int($0.width)) / \(Int($0.height))'"}
+            result += "<div class='swiper-slide'\(sizeText ?? "")>"
             result += image.content
             if needsPagination {
                 result += "<div class='swiper-lazy-preloader swiper-lazy-preloader-white'></div>"
@@ -57,6 +58,9 @@ struct ImageGallery: HtmlProducer {
         return """
         var swiper_\(id) = new Swiper("#\(id)", {
               loop: true,
+              lazy: {
+                  loadPrevNext: false,
+              },
               slidesPerView: 1,
               spaceBetween: 30,
               centeredSlides: true,