libkdcraw :

- Remove dependencies to KIntNumInput KDoubleNumInput deprecated for KF5. This close all warnings in this library.
- Add minimal slider widget from Krita to have same look than Gimp and Photoshop. Adapt API to libkdcraw. Code polish.
- Add libkdcraw settings widget to tune Raw decoding settings while processing into Multithreaded RAW To PNG test program.
BUGS: 284216
FIXED-IN: 5.0.0