D7620: Fix KHelpMenu position on Wayland

[Martin Flöser]

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

REPOSITORY
  R263 KXmlGui

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D7620

To: elvisangelaccio, #frameworks, davidedmundson, graesslin