Treat rewards as income toggle

We currently have the following option in the settings:

Treat airdrops and forks as income?

It would be nice to have the same toggle for rewards, because in some countries, you can treat rewards from staking as a gain instead of an income.

eg: in France (cf: concurrent app article in french: Revenus de masternodes, staking et minage | Waltio Centre d'aide 😃 )