D24240: [effects/presentwindows] Port present windows to EffectQuickView

davidedmundson created this revision.
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REVISION SUMMARY
  Removes over 100 lines of rather confusing code, implicitly introduces a
  sharedEngine. Doesn't perform hide/show by moving a window offscreen.
  
  As for the freeze, proving that EffectQuickView covers this case without
  lots of extra C++ is an important pre-requisite for ever moving this
  effect to a magic declarative API.
  
  General code structure remains the same.

TEST PLAN
  Opened present windows

REPOSITORY
  R108 KWin

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D24240

AFFECTED FILES
  effects/presentwindows/main.qml
  effects/presentwindows/presentwindows.cpp
  effects/presentwindows/presentwindows.h

To: davidedmundson, #kwin
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