Enable magnific popup on <a> tags only when it has <img> (mmistakes#3114)

Author: iBug

assets/js/_main.js

@@ -84,7 +84,7 @@ $(document).ready(function() {
   // add lightbox class to all image links
   $(
     "a[href$='.jpg'],a[href$='.jpeg'],a[href$='.JPG'],a[href$='.png'],a[href$='.gif'],a[href$='.webp']"
-  ).addClass("image-popup");
+  ).has("> img").addClass("image-popup");;
 
   // Magnific-Popup options
   $(".image-popup").magnificPopup({