D27333: Return early if close button accepts input event

davidedmundson created this revision.
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REVISION SUMMARY
  Otherwise we close the effect whenever the close is pressed which is a
  behavioural change.
  
  That in turn leads to bigger bugs
  
  BUG: 415155

TEST PLAN
  Ran effect
  Clicked on the "Whitespace" of the dash
  Clicked on the close
  
  Now matches desktopgrid code

REPOSITORY
  R108 KWin

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D27333

AFFECTED FILES
  effects/presentwindows/presentwindows.cpp

To: davidedmundson, #kwin
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