[Differential] [Accepted] D787: Properly set modality on AuthDialog

[davidedmundson (David Edmundson)]

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

REPOSITORY
  rPOLKITKDEAGENT Policykit (Polkit) KDE Agent

BRANCH
  fix-modality

REVISION DETAIL
  https://phabricator.kde.org/D787

EMAIL PREFERENCES
  https://phabricator.kde.org/settings/panel/emailpreferences/

To: graesslin, Plasma, davidedmundson
Cc: plasma-devel