Display tests in blog everywhere same as posts

* Display tests on homepage, in categories and other places just like posts
* Allow to hide individual tests from homepage by "Publish on the home page" setting at publish box
* Fix quickedit for posts
* Fix quickedit for tests by saving test part only in full edit mode
* Minimize possibility of "Max post vars" warning by minizing the number of hidden inputs

git-svn-id: https://plugins.svn.wordpress.org/wp-testing/trunk@1022607 b8457f37-d9ea-0310-8a92-e5e31aec5664