D15623: Finish the notification before removing it from the hash

[Kai Uwe Broulik]

broulik added a reviewer: sitter.

REPOSITORY
  R289 KNotifications

REVISION DETAIL
  https://phabricator.kde.org/D15623

To: jtamate, #frameworks, sitter
Cc: kde-frameworks-devel, michaelh, ngraham, bruns