D18915: Fix batchrename changing extension to lower case

[Stefan Brüns]

bruns added a comment.


  LGTM

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D18915

To: cfoster, #dolphin, #frameworks, abalaji
Cc: cfeck, bruns, ngraham, elvisangelaccio, chinmoyr, kde-frameworks-devel, 
michaelh