D8683: Only prevent the name to update if it's empty

[Aleix Pol Gonzalez]

apol created this revision.
apol added reviewers: Frameworks, dfaure.
Restricted Application added a project: Frameworks.

REPOSITORY
  R241 KIO

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D8683

AFFECTED FILES
  src/core/kfileitem.cpp

To: apol, #frameworks, dfaure