message: [contour] KDE background contract option fix
diff: @@ -1083,7 +1083,7 @@ bool TerminalWindow::enableBackgroundBlur([[maybe_unused]] bool _enable)
  {
  #if defined(CONTOUR_BLUR_PLATFORM_KWIN)
  KWindowEffects::enableBlurBehind(winId(), _enable);
  - KWindowEffects::enableBackgroundContrast(winId(), !_enable);
  + KWindowEffects::enableBackgroundContrast(winId(), _enable);
  return true;
  #elif defined(_WIN32)
  // Awesome hack with the noteworty links:
  