D11511: [KPropertiesDialog] Support X-KDE-Protocols

[David Faure]

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

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D11511

To: broulik, #frameworks, dfaure
Cc: michaelh, bruns