cpp: Add support for multiple keysigs in edit
* lang/cpp/src/gpgsignkeyeditinteractor.cpp (GpgSignKeyEditInteractor::setDupeOk): New. (makeTable): Add new tansitions. (SignKeyState): Add DUPE_OK Status. (GpgSignKeyEditInteractor::action): Handle DUPE_OK. (GpgSignKeyEditInteractor::Private::Private): Carry flag.
When extended-edit is enabled this can be used to answer
the "dupe_ok" query from the edit-key with yes.
This is for:
- GnuPG-Bug-Id: T4734