During the user sessions I did today, all 3 users who used the "Browse > Pages - Tree View" section expected a "Save" button after they reordered the pages.

We should do this like so:

• The page starts with two disabled "Save" and "Cancel" buttons at the top and bottom of the tree.
• When a page is moved, the buttons are enabled.
• The user has to click "Save" to confirm their moving/reordering. If the user clicks "Cancel", the structure is reverted back to what it was when the user arrived (or when they last clicked the "Save" button).