ENGCOM-6308: #25652: Arrows (.fotorama__thumb__arr) don't work in product gallery #25666

 - Merge Pull Request #25666 from alexey-rakitin/magento2:fotorama-disabled-thumbs
 - Merged commits:
   1. f97f68d

Author: magento-engcom-team

lib/web/mage/gallery/gallery.less

@@ -418,9 +418,8 @@
 }
 
 .fotorama__arr--disabled {
-    *display: none;
     cursor: default;
-    opacity: 0.1;
+    opacity: 0;
     pointer-events: none;
 }