* LDAP/AD/UCS/Filemanager: group-names were displayed as "#123" instead of name

caused by LDAP backend needs correct negative sign for groups, while SQL backend finds groups also with there positive id

filemanager/inc/class.filemanager_ui.inc.php

@@ -872,6 +872,7 @@ class filemanager_ui
 				$row['class'] = 'isDir';
 			}
 			$row['download_url'] = egw_vfs::download_url($path);
+			$row['gid'] = -abs($row['gid']);	// gid are positive, but we use negagive account_id for groups internal
 
 			$rows[++$n] = $row;
 			$path2n[$path] = $n;