D17617: Display error instead of silently failing when asked to create folder that already exists

[Nathaniel Graham]

ngraham added a comment.


  Unfortunately this broke the `knewfilemenu` test, sorry about that. Here's a 
patch that fixes it: https://phabricator.kde.org/D17911

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D17617

To: ngraham, #dolphin, elvisangelaccio, dfaure
Cc: anthonyfieroni, dfaure, emateli, elvisangelaccio, Codezela, 
kde-frameworks-devel, michaelh, ngraham, bruns