static function on Extension classes.
BUGFIX FulltextSearchable didn't pass through arguments, use now
available $args parameter with FulltextSearchable::add_to_class()
This solves a bugfix when calling singleton($className)->summaryFields() and Versioned kicks back. It is needed to by the GridField functionality to get default columns to show.
This is due to DataExtension calls ClassName::extraStatics() when calling ::load_extra_statics() statically, we need to pass in class and extension.
MINOR Checking for SiteTree class existence in Security, Translatable
MINOR Checking for ContentController existence in FulltextSearchable
MINOR Removed unnecessary ContentController tests from ObjectTest
MINOR Replaced CMS specific examples in PermissionCheckboxSetFieldTest, DataObjectTest
MINOR Changed SecurityTest to make assertions against Security/login rather than relying on redirection from admin/cms
