D20838: Allow to drop one file or one folder on KDirOperator

[Méven Car]

meven marked 8 inline comments as done.

REPOSITORY
  R241 KIO

BRANCH
  arcpatch-D20838

REVISION DETAIL
  https://phabricator.kde.org/D20838

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