D22981: Minor code improvements

[Filip Fila]

This revision was automatically updated to reflect the committed changes.
Closed by commit R123:c1c4e03b0003: Minor code improvements (authored by filipf).

REPOSITORY
  R123 SDDM Configuration Panel (KCM)

CHANGES SINCE LAST UPDATE
  https://phabricator.kde.org/D22981?vs=63250&id=63503

REVISION DETAIL
  https://phabricator.kde.org/D22981

AFFECTED FILES
  sddmauthhelper.cpp
  sddmauthhelper.h
  src/advanceconfig.cpp
  src/advanceconfig.h

To: filipf, davidedmundson, ngraham, #plasma
Cc: plasma-devel, LeGast00n, jraleigh, fbampaloukas, GB_2, ragreen, Pitel, ZrenBot, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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