recent khtml regression

[Maksim Orlovich]

> khtml now crashes when I try to log in on www.voyages-sncf.com (by
> pressing Enter).
> Valgrind trace below.
> Basically, the lineedit gets deleted by a DeferredDelete event executed
> while the dialog box asking whether to save the form contents in kwallet
> is up.
> Seems obvious, but then I wonder why it didn't happen before.
> Sounds like some event handling code is still being executed in the
> deleted node after the whole page was deleted.
> Anyone changed event handling recently?

I made some changes to focus handling which might be relevant, or not...
This needs some debugging, though, since the widgets are refcount-guarded...