[O] Changing behavior of org-insert-todo-heading-respect-content

[Allen Li]

Regarding the behavior of org-insert-todo-heading-respect-content,
bound to C-S-return, consider the following .org file:

* TODO some task
** WAITING other task

If point is on the TODO line, pressing C-S-return yields

* TODO some task
** WAITING other task
* WAITING

When I use C-S-return, I always desire

* TODO some task
** WAITING other task
* TODO

Making C-S-return do this would break backward compatibility, but I
think this behavior is more intuitive.  Thoughts?