D17691: Add rows info to the plasma virtual desktop protocol

[Eike Hein]

hein added a task: T4457: [kwayland] Virtual Desktop protocol.

REPOSITORY
  R127 KWayland

REVISION DETAIL
  https://phabricator.kde.org/D17691

To: mart, #plasma, #kwin
Cc: zzag, davidedmundson, hein, kde-frameworks-devel, michaelh, ngraham, bruns