D19422: Fix upper/lower case rename on case insensitive fs

[Nathaniel Graham]

ngraham added reviewers: dfaure, chinmoyr.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D19422

To: hoffmannrobert, #frameworks, #dolphin, dfaure, chinmoyr
Cc: kde-frameworks-devel, michaelh, ngraham, bruns