[Differential] [Request, 5 lines] D2570: Fix panelview config cleanup

[davidedmundson (David Edmundson)]

davidedmundson created this revision.
davidedmundson added a reviewer: Plasma.
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REVISION SUMMARY
  Connecting to QObject::destroyed with Qt::QueuedConnection *should*
  crash, when you use the object that's been deleted. it doesn't make any
  logical sense.
  
  The only reason it doesn't is because of another hack in Plasma-
  framework where containment.cpp where containment emits
  QObject::destroyed (yes really)  before the actual destruction.
  
  Unfortunately we can't fix the hack in frameworks till we fix this hack
  round the original hack here.
  
  This patch ports it to a different signal, which is emitted before
  object teardown without hacks.

TEST PLAN
  checked debug appeared when deleting a panel

REPOSITORY
  rPLASMAWORKSPACE Plasma Workspace

BRANCH
  autostart2

REVISION DETAIL
  https://phabricator.kde.org/D2570

AFFECTED FILES
  shell/panelview.cpp

EMAIL PREFERENCES
  https://phabricator.kde.org/settings/panel/emailpreferences/

To: davidedmundson, #plasma
Cc: plasma-devel, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas
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