make use of above change to have the right category by default if the form isn't empty

templates/site/torrents/upload.jet.html

@@ -129,6 +129,7 @@
 		document.getElementsByClassName["form-language-checkbox"][lang_index].addEventListener("change", UpdateTorrentLang);
 	
 	UpdateTorrentLang();
+	UpdateCategory();
 </script>
 <script type="text/javascript" src="/js/kilo.js"></script>
 <script type="text/javascript" src="/js/simplemde.min.js?v={{ Config.Version}}{{ Config.Build }}"></script>