LPS-23733 = Update themes plugin compatibility with IE6, IE7, IE8, IE9, Chrome, and Firefox

Can you review these changes I've made to the themes? This ticket can be found at http://issues.liferay.com/browse/LPS-23733.

Here are some notes for you to review:

Check themes in Chrome, FF, Safari, IE 9, 8 , 7, 6
Some of these issues might occur only in IE6, but give a crack at seeing if they are simple fixes.

Brochure theme search bar overlaps site title
Emerald theme has issues with navigation
Illuminate theme has issues with navigation
Noir theme move background image in html to .popup
Sample-HTML 4 theme has the popup window buttons cut off
Sample-Unstyled theme has the popup window buttons cut off
Section 508 theme portlet icons missing
Seven Cogs theme has bullet image for list items
SO theme has not been reviewed yet (Not sure if we are to review this theme)?
Spurt theme "Powered by" footer is behind body content
Tuxedo theme has issue with navigation
Wordpress Kubrick theme has space below the header
Zen theme does not render correctly
Please let me know if you have any questions. Thanks!

- Jon Mak