send to all, members, staff, admins from list of chatters

lang_zh-Hans.php

@@ -158,6 +158,8 @@ $T=[
 	'randomcol' => '随机颜色',
 	'enter' => '回车',
 	'error' => '错误',
+	'admin' => '管理',
+	'staff' => '工作人员',
 	'members' => '会员',
 	'guests' => '游客',
 	'approveguests' => '%d新客人批准',