D8820: Don't notify about value changes if we are still in the constructor

[David Edmundson]

davidedmundson accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R169 Kirigami

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D8820

To: apol, #frameworks, davidedmundson
Cc: davidedmundson, broulik, plasma-devel, apol, mart, hein