* Deleted createEventFromEvent() because the event-specific menu no
   longer has a menu item that creates another event.  Deleted
   createTodoFromTodo() for the same reason.

 * The other create* tests were failing because menu items no longer have
   object names.  Switched to C-locale item text; since it is key to
   i18n, it should be stable.

 * Deleted

 * Deleted defaultMenuEventVisible() because the "is visible" tests are
   covered by other tests, and the "not visible" test is an implementation
   detail.  Deleted defaultMenuTodoVisible() for the same reason.