D24013: Fix encoding of size tooltip in radial map

[Christoph Feck]

cfeck created this revision.
cfeck added a reviewer: sandsmark.
Herald added a subscriber: kde-utils-devel.
cfeck requested review of this revision.

REVISION SUMMARY
  class File (see `fileTree.h`) internally stores filenames in 8 bit encoding.
  The size tooltip uses the same API, but does not correctly encode the tooltip to 8 bit.
  It uses UTF-8, while the system might have a different local encoding.
  
  Changing `toUtf8()` to `QFile::encodeName()` fixes this.
  
  BUG: 411243
  FIXED-IN: 19.08.2

REPOSITORY
  R352 Filelight

REVISION DETAIL
  https://phabricator.kde.org/D24013

AFFECTED FILES
  src/radialMap/map.cpp

To: cfeck, sandsmark
Cc: kde-utils-devel, #kde_applications
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