fix: the cached image is covered by shimmer (#1100)

Author: cotes2020

_javascript/modules/components/img-lazyload.js

@@ -2,14 +2,26 @@
  * Set up image lazy-load
  */
 
+function stopShimmer($node) {
+  $node.parent().removeClass('shimmer');
+}
+
 export function imgLazy() {
-  if ($('#core-wrapper img[data-src]') <= 0) {
+  const $images = $('#core-wrapper img[data-src]');
+
+  if ($images.length <= 0) {
     return;
   }
 
   /* Stop shimmer when image loaded */
   document.addEventListener('lazyloaded', function (e) {
-    const $img = $(e.target);
-    $img.parent().removeClass('shimmer');
+    stopShimmer($(e.target));
+  });
+
+  /* Stop shimmer from cached images */
+  $images.each(function () {
+    if ($(this).hasClass('ls-is-cached')) {
+      stopShimmer($(this));
+    }
   });
 }