* dng gainmap support, #6379 * dng GainMap: control sensitivity of checkbox, #6379 * dng GainMap: partial paste * dng GainMap: moved isGainMapSupported() from dcraw.h to dcraw.cc * RawImageSource::applyDngGainMap: small speedup * Change GUI to separate gainmap from other flat-field; also reorder checkbox Co-authored-by: Thanatomanic <6567747+Thanatomanic@users.noreply.github.com>