Not everything in the head is a header

[brianteeman]

This is not a column header so it should be a td and not a th. See all other tables in Joomla for an example

gsoc25_api/src/administrator/components/com_ccm/tmpl/cmss/default.php

Lines 44 to 46 in 029d924

	<th width="1%" class="nowrap center">
	<?php echo HTMLHelper::_('grid.checkall'); ?>
	</th>

[HermanPeeren]

Interesting. Didn't know that and have never used it. Deserves better documentation.

[HermanPeeren]

Fixed in pr #54