D18365: Add flag to keep a window on top.

[Vlad Zagorodniy]

zzag added a comment.


  Looks good to me.
  
  (please remove period from the title)

REPOSITORY
  R127 KWayland

REVISION DETAIL
  https://phabricator.kde.org/D18365

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