D5242: fixes for plasmawindowed sni support

[David Edmundson]

davidedmundson accepted this revision.

REPOSITORY
  R120 Plasma Workspace

REVISION DETAIL
  https://phabricator.kde.org/D5242

To: mart, apol, davidedmundson
Cc: apol, plasma-devel, progwolff, lesliezhai, ali-mohamed, jensreuterberg, 
abetts, sebas