[Feature] Added new functionality to inactive users module:

- Ability to set users per page.
- Ability to sort by posts/number of reminders/last reminded date.
- Show number of posts and ability to search posts.
- Show number of reminders sent to user.
- Show date of last reminder sent to user.


git-svn-id: file:///svn/phpbb/branches/phpBB-3_0_0@9845 89ea8834-ac86-4346-8a33-228a782c2dd0

phpBB/language/en/acp/common.php

@@ -399,6 +399,8 @@ $lang = array_merge($lang, array(
 	'SORT_LAST_VISIT'	=> 'Last visit',
 	'SORT_REASON'		=> 'Reason',
 	'SORT_REG_DATE'		=> 'Registration date',
+	'SORT_LAST_REMINDER'=> 'Last reminded',
+	'SORT_REMINDER'		=> 'Reminder sent',
 
 	'USER_IS_INACTIVE'		=> 'User is inactive',
 ));