D11097: [Window Thumbnail] Allow using atlas texture

[David Edmundson]

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

REPOSITORY
  R242 Plasma Framework (Library)

REVISION DETAIL
  https://phabricator.kde.org/D11097

To: broulik, #plasma, davidedmundson
Cc: #frameworks, michaelh