D13495: Fix XDGV6 popup test

[David Edmundson]

davidedmundson added a dependent revision: D13530: Add XDG WmBase support.

REPOSITORY
  R127 KWayland

REVISION DETAIL
  https://phabricator.kde.org/D13495

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