add a whole directory as one item to refile targets

[Eraldo Helal <eraldo@eraldo.at>]

If I do "C-c C-w" (refile), I get the following:

NOW:
 Click <mouse-2> on a completion to select it.
 In this buffer, type RET to select the completion near point.

 Possible completions are:
 done.org/ 	eraldo.org/ inbox.org/

WANTED:
 Possible completions are:
 done.org/ 	eraldo.org/ inbox.org/ Reference/

In other words...
I would like to have a whole directory as one item listed in my refile targets.


Greetings from Austria,
Eraldo & Lea


PS:
Another possibility would be to be able to refile to any other place
apart from the defined ones via prefix or shortcut.