Merge pull request #5700 from Wikia/CON-2323

CON-2323 | box-sizing support for Firefox < 29
Conflicts:
	extensions/wikia/GlobalNavigation/templates/GlobalNavigation_searchIndex.php
Merge pull request #5832 from Wikia/CON-2323-r255

CON-2323 | box-sizing support for Firefox < 29