admin tag selection use event delegation (faster load time with large number of tags)

git-svn-id: http://piwigo.org/svn/trunk@28317 68402e56-0260-453c-a942-63ccdbb3a9ee

admin/themes/default/template/include/tag_selection.inc.tpl

@@ -1,14 +1,14 @@
 {footer_script require='jquery'}{literal}
 jQuery(document).ready(function(){
-  jQuery(".tagSelection label").click(function () {
+  jQuery(".tagSelection").on("click", "label", function () {
     var parent = jQuery(this).parent('li');
     var checkbox = jQuery(this).children("input[type=checkbox]");
 
     if (jQuery(checkbox).is(':checked')) {
-      jQuery(parent).addClass("tagSelected"); 
+      parent.addClass("tagSelected"); 
     }
     else {
-      jQuery(parent).removeClass('tagSelected'); 
+      parent.removeClass('tagSelected'); 
     }
   });
 });