[KFileWidget] Use KMessageWidget for error reporting
Instead of a KMessageBox. It's a lot nicer :)
(Didn't dare touching KDirOperator, though)
Seems to reliably go away when navigating to a different folder (not entirely sure under which circumstances urlEntered is and isn’t emitted)
I wonder if KDirOperator should emit canceled when jobError occurs?
The error message boxes ("can only select one file", "file could not be found", etc) when accepting the dialog are kept.
Edited by Kai Uwe Broulik