* In KIO::Scheduler attempt to find and use the window-id from the top most

  level window so that the ids used will not be from temporary short lived
  windows such as file dialogs.

* Set the window widget when calling KIO functions in KFileDialog and related
  classes so that password information is preserved for the entire life of the
  application from which the file dialog is launched instead of a short duration.

BUG: 179663
FIXED-IN: 4.7.4
REVIEW: 103226