Hook up virtual_desktop_changeable state.

Summary: Depends on D1448.

Reviewers: graesslin

Subscribers: plasma-devel

Projects: #plasma

Differential Revision: https://phabricator.kde.org/D1449

abstract_client.cpp

@@ -652,6 +652,7 @@ void AbstractClient::setupWindowManagementInterface()
     w->setShaded(isShade());
     w->setResizable(isResizable());
     w->setMovable(isMovable());
+    w->setVirtualDesktopChangeable(true); // FIXME Matches Client::actionSupported(), but both should be implemented.
     connect(this, &AbstractClient::skipTaskbarChanged, w,
         [w, this] {
             w->setSkipTaskbar(skipTaskbar());