Add a way to cancel creating a new post

[kellim]

When you login as an admin and select "New Post" from the menu, there is no option to cancel creating that new post. The only options other than normal site navigation are two buttons "Preview" and "Save Article" at the bottom of the page.

Note: A "back" button was added when you are editing an existing post that takes you back to the dashboard, but it was not added to the New Post page.