D21481: Don't notify about changing to the same state it was at

[Aleix Pol Gonzalez]

apol added a reviewer: Plasma.

REPOSITORY
  R242 Plasma Framework (Library)

REVISION DETAIL
  https://phabricator.kde.org/D21481

To: apol, #plasma
Cc: kde-frameworks-devel, michaelh, ngraham, bruns