set skipTaskbar on SurfaceEvent::SurfaceCreated

Summary: makes sure the flag is set on time

Test Plan: can't get the panelcontroller in the taskbar anymore

Reviewers: #plasma, hein, broulik

Reviewed By: #plasma, hein, broulik

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D18186

shell/panelconfigview.cpp

@@ -238,6 +238,8 @@ bool PanelConfigView::event(QEvent *e)
     if (e->type() == QEvent::PlatformSurface) {
         switch (static_cast<QPlatformSurfaceEvent*>(e)->surfaceEventType()) {
         case QPlatformSurfaceEvent::SurfaceCreated:
+            KWindowSystem::setState(winId(), NET::SkipTaskbar | NET::SkipPager);
+
             if (m_shellSurface) {
                 break;
             }

shell/panelview.cpp

@@ -587,7 +587,6 @@ void PanelView::showConfigurationInterface(Plasma::Applet *applet)
                     m_panelConfigView->hide();
                 } else {
                     m_panelConfigView->show();
-                    KWindowSystem::setState(m_panelConfigView.data()->winId(), NET::SkipTaskbar | NET::SkipPager);
                 }
                 return;
             }