Log Message:
kwindowsystem: update to 5.70.0

5.67
  [KWindowShadows] Check for X connection
  Introduce shadows API
  Deprecate KWindowEffects::markAsDashboard()
5.69
  Fix EWMH non-compliance for NET::{OnScreenDisplay,CriticalNotification}
  KWindowSystem: deprecate KStartupInfoData::launchedBy, unused
  Expose application menu via KWindowInfo
5.70
  Print meaningful warning when there is no QGuiApplication