Change the following in post edit link

$Item->edit_link( array( // Link to backoffice for editing
		'before'    => ' | ',
		'after'     => '',
		'text'     => get_icon('edit'),
		'title'     => T_('Edit'),
	) );

and for comments in skins/_item_comment.inc.php

$Comment->edit_link( '', '', get_icon('edit'), T_('Edit'), 'permalink_right' );
$Comment->delete_link( '', '', get_icon('delete'), T_('Delete'), 'permalink_right' );