Improvements on the Create Page step

See current.png for the current behavior.

The problem is that we are first asking for the Space name, and just after we ask for the Page Name.

Also the user doesn't have an idea of the location of the page he is creating.
See in the mockup an improvement of this behavior: createPage.png and createPageExpanded.png

Another improvement would be to display also the Page/Child hierarchy, just like the way we display the location.