D14757: Warn user before copy/move operation if available space is not enough

[Shubham]

shubham marked an inline comment as done.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D14757

To: shubham, pino, dfaure, broulik
Cc: ngraham, dfaure, pino, kde-frameworks-devel, michaelh, bruns