Replace x11/kde4/{libkipi,libkdcraw,libksane} by digikam-kde4 -dcraw, -libkipi, -sane to avoid bulk conflicts with KDE4 and 5 applications. With this move we have to go without ksaneplugin and drop support in graphics-thumbnailers and ksnapshot. Help from jca@ with packages adjustments. Spotted by many over months, thanks!