D29050: WIP KRunner fix prepare/teardown signals

[Méven Car]

meven added a comment.


  > Try out what was described in bug report.
  
  Please copy it the TEST PLAN (it is easier on reviewers and better for history)
  
  Adding a test would be the best way to demonstrate the issue and the fix.

REPOSITORY
  R308 KRunner

REVISION DETAIL
  https://phabricator.kde.org/D29050

To: alex, meven, ngraham, broulik
Cc: kde-frameworks-devel, LeGast00n, cblack, michaelh, ngraham, bruns
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