[svn r13299] Removed order possibility from columns where it doesn't work

Reversed order (now sticks to the arrow direction)

main/tracking/courseLog.php

@@ -476,15 +476,15 @@ else {
 	if(count($a_students)>0)
 	{
 		$table = new SortableTable('tracking', 'count_student_in_course');
-		$table -> set_header(0, get_lang('OfficialCode'), true, 'align="center"');
+		$table -> set_header(0, get_lang('OfficialCode'), false, 'align="center"');
 		$table -> set_header(1, get_lang('LastName'), true, 'align="center"');
-		$table -> set_header(2, get_lang('FirstName'), true, 'align="center"');
+		$table -> set_header(2, get_lang('FirstName'), false, 'align="center"');
 		$table -> set_header(3, get_lang('Time'),false);
 		$table -> set_header(4, get_lang('Progress'),false);
 		$table -> set_header(5, get_lang('Score'),false);	
 		$table -> set_header(6, get_lang('Student_publication'),false);
 		$table -> set_header(7, get_lang('Messages'),false);
-		$table -> set_header(8, get_lang('LatestLogin'), true, 'align="center"');
+		$table -> set_header(8, get_lang('LatestLogin'), false, 'align="center"');
 		$table -> set_header(9, get_lang('Details'),false);
 	     
 	    if($export_csv)
@@ -540,7 +540,7 @@ else {
 		}
 		
 		usort($all_datas, 'sort_users');
-		if($tracking_direction == 'ASC')
+		if($tracking_direction == 'DESC')
 			rsort($all_datas);
 		
 		$page = $table->get_pager()->getCurrentPageID();