Save profile button is enabled when user is not logged in

[jcohen02]

The "Save Profile" button below a tree is, by default, disabled when there is no tree displayed or when the user is not logged in.

When a template is selected, the save profile button should only be enabled if the user is logged in. At present the button is enabled regardless of whether the user is logged in or not.

If the user attempts to save a profile when they're not logged in, the save fails with a generic error message. The server side is picking up that the user is not authenticated and returning a 403 error but the client side doesn't pick this up.