D9803: Apply some C++11 niceties, styling consistency

[Marco Martin]

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

REPOSITORY
  R858 Qt Quick Controls 2: Desktop Style

BRANCH
  c++11

REVISION DETAIL
  https://phabricator.kde.org/D9803

To: Kanedias, mart
Cc: apol, plasma-devel, ZrenBot, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, mart
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