Code style / syntax cleanup #2

[ghost]

http://joomlacode.org/gf/project/joomla/tracker/?action=TrackerItemEdit&tracker_item_id=31323

These are code style and minor syntax changes. So nothing in functionality should be changed.

This PR is the 2nd in a series.

This is a cleanup of the following folders:

/administrator/components/com_categories
/administrator/components/com_checkin
/administrator/components/com_config

administrator/templates/hathor/html/com_categories
administrator/templates/hathor/html/com_checkin
/administrator/templates/hathor/html/com_config

Testing instructions

Check if all the views of these components still function as expected.

PR Series

1. Code style / syntax cleanup #1 #1395
2. Code style / syntax cleanup #2 #1403

[mbabker]

I think these two lines are OK using inline conditionals. Our layout files have selective enforcement of many of the PHPCS rules due to the mixed HTML/PHP nature which causes a lot of false failures otherwise.

[ghost]

Changed inline if syntax from:
if ($listDirn == 'asc') echo 'selected="selected"';
to:
echo $listDirn == 'asc' ? ' selected="selected"' : '';