from Amos Gouaux:

Oh, I was wondering if maybe when clicking on a link for a page that
doesn't already exist, thereby setting you up to create that page, if
maybe it could pre-insert the refering page in the Parent Page link
box at the bottom of the screen? I sometimes forget these page
names. Sometimes I even have to login in another window and see
what things are named so I can finish Adding the one I'm currently
working on.