D22620: Add function to suggest a unique filename

[David Faure]

dfaure accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R244 KCoreAddons

BRANCH
  suggestname

REVISION DETAIL
  https://phabricator.kde.org/D22620

To: nicolasfella, dfaure
Cc: kde-frameworks-devel, LeGast00n, sbergeron, michaelh, ngraham, bruns