D22379: Don't use deprecated QDesktopWidget

[Vlad Zagorodniy]

zzag created this revision.
zzag added a reviewer: KWin.
Herald added a project: KWin.
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REVISION SUMMARY
  QApplication::desktop() is deprecated. It is advised to use
  QGuiApplication::screens() instead.

REPOSITORY
  R108 KWin

BRANCH
  fix-warnings

REVISION DETAIL
  https://phabricator.kde.org/D22379

AFFECTED FILES
  kcmkwin/kwinoptions/windows.cpp
  kcmkwin/kwinscreenedges/monitor.cpp
  kcmkwin/kwintabbox/layoutpreview.cpp
  kcmkwin/kwintabbox/main.cpp

To: zzag, #kwin
Cc: kwin, LeGast00n, sbergeron, jraleigh, fbampaloukas, GB_2, mkulinski, ragreen, jackyalcine, Pitel, iodelay, crozbo, bwowk, ZrenBot, ngraham, alexeymin, himcesjf, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, mart
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