Fields involvesWatchonly, generated, walletconflicts were missing
in result description of listtransactions, listsinceblock,
gettransaction
Align getttransaction fields which were odd compare to other rpc
helpers
https://github.com/bitcoin/bitcoin/pull/16689/commits/f4c8953b0073e6bc37abd18ec4a5cbc3ea9719a1
Depends on D7384
Concludes backport of Core PR16689