Fix from 1.9.x

main/gradebook/lib/fe/linkaddeditform.class.php

@@ -30,9 +30,10 @@ class LinkAddEditForm extends FormValidator
 		// set or create link object
 		if (isset($link_object)) {
 			$link = $link_object;
-		} elseif (isset ($link_type) && isset ($category_object)) {
+		} elseif (isset($link_type) && isset($category_object)) {
 			$link = LinkFactory :: create ($link_type);
 			$link->set_course_code(api_get_course_id());
+			$link->set_category_id($category_object[0]->get_id());
 		} else {
 			die ('LinkAddEditForm error: define link_type/category_object or link_object');
 		}

main/inc/lib/groupmanager.lib.php

@@ -2730,7 +2730,7 @@ class GroupManager
     public static function getSearchForm()
     {
         $url = api_get_path(WEB_CODE_PATH).'group/group_overview.php?'.api_get_cidreq();
-        $form = new FormValidator('search_groups', 'get', $url, null, array(), FormValidator::LAYOUT_INLINE);
+        $form = new FormValidator('search_groups', 'get', $url, null, array('class' => 'form-search'), FormValidator::LAYOUT_INLINE);
         $form->addElement('text', 'keyword');
         $form->addButtonSearch();
         return $form->toHtml();