D25420: [KFileWidget] Avoid calling slotOk right after the url changed

[Méven Car]

meven added a reviewer: elvisangelaccio.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D25420

To: meven, #frameworks, ngraham, elvisangelaccio
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns