🐛 Fixed infinitescroll when a paged url is loaded directly (#447)

closes #445
- added an fn to sanitize the pathname, that might include a pagination url
- fixed an issue, where the request would still be made if the current page is bigger than max pages
- added comments

default.hbs

@@ -65,6 +65,9 @@
 
     {{#if pagination.pages}}
     <script>
+        // maxPages is a global variable that is needed to determine
+        // if we need to load more pages for the infinitescroll, or if
+        // we reached the last page already.
         var maxPages = parseInt('{{pagination.pages}}');
     </script>
     <script src="{{asset "js/infinitescroll.js"}}"></script>