Create-from-Template fails without Parent Page

A user clicks on a create-from-template button that is configured to send the new page to another space.

If a user does not provide a parent page by sending the page to its doctype homepage, the wizard stalls.

The reason is that the projectdoc Toolbox requires a parent page to send the new page to. Unfortunately one of the services does not default to the space homepage, assuming that a parent is always specified. Due to the service API this assumption is wrong.