D7285: pim-sieve-editor: sieveeditormainwindow: use QPointer to protect crash of ImportImapSettingWizard

[Allen Winter]

winterz added a comment.


  this is to prevent a crash as described in https://blogs.kde.org/node/3919

REPOSITORY
  R213 PIM Sieve Editor

REVISION DETAIL
  https://phabricator.kde.org/D7285

To: winterz, mlaurent
Cc: #kde_pim, dvasin, winterz, vkrause, mlaurent, knauss, dvratil
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