adapt to new libksane interface
Since KDE Gear 21.08, libksane has a QImage based interface to retrieve the scans and the old one is deprecated. Use the new interface and also cleanup the old connection syntax in the plugin and emit keyword.
Since KDE Gear 21.08, libksane has a QImage based interface to retrieve the scans and the old one is deprecated. Use the new interface and also cleanup the old connection syntax in the plugin and emit keyword.