D18599: Use specific error message if file/folder name contains '/'

[Shubham]

shubham abandoned this revision.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D18599

To: shubham, ngraham, #vdg, #frameworks, #dolphin
Cc: kde-frameworks-devel, LeGast00n, michaelh, ngraham, bruns