order create - enhancements

Ability to remove a cart from the session - this does not delete the
cart, just removes it from the vars.carts array. That way, an admin can
safely remove the cart from their session without impacting the buyers
experience.

Added some titles to the save and remove buttons to more clearly
indicate what they do.
admin - better support for tabs in navigateTo

for the tabs, #: syntax was supported but #! was not. added it.
cart message - start of admin UI (cart manager)