[For 1.8] Advanced Private Message Notice

[.m.]

@RocketFoot , this plugin uses global templates. no changes are required in the templates of individual themes.

@labrocca , you can easily add required collapse & expand code into advancedpmnotice template

eg. code [may not be the perfect]

<table border="0" cellspacing="{$theme['borderwidth']}" cellpadding="{$theme['tablespace']}" class="tborder">
	<thead>
<tr>
		<td class="thead" colspan="5"><a href="{$mybb->settings['bburl']}/private.php"><strong>{$lang->advancedpmnotice_header}</strong></a><div class="expcolimage"><img src="{$theme['imgdir']}/collapse{$collapsedimg['indexapm']}.png" id="indexapm_img" class="expander" alt="{$expaltext}" title="{$expaltext}"></div></td>
	</tr>
	</thead>
	<tbody style="{$collapsed['indexapm_e']}" id="indexapm_e"> 
	<tr>
		<td class="tcat" width="20%" align="left">{$lang->advancedpmnotice_subject}</td>
		<td class="tcat" width="50%" align="left">{$lang->advancedpmnotice_message}</td>
		<td class="tcat" width="10%" align="center">{$lang->advancedpmnotice_from}</td>
		<td class="tcat" width="15%" align="center">{$lang->advancedpmnotice_date}</td>
		<td class="tcat" width="5%" align="center">{$lang->advancedpmnotice_controls}</td>
	</tr>
	{$advancedpmnotice_unread_pms}
	{$advancedpmnotice_footer}
	</tbody>	
</table>