always display pubkey with checksum

I have seen two cases of lost transaction due to wrong manual copy of a pubkey. I think the use of a checksum should become a norm in Duniter clients.

So, I propose that Silkaj should always display pubkeys as <pubkey>:<checksum>

edit : format proposal for short display : https://forum.duniter.org/t/securisation-des-virements-validation-de-la-clef-publique-de-destination/6901/29

full : J4c8CARmP9vAFNGtHRuzx14zvxojyRWHW2darguVqjtX:KAv
short : J4c8CA…:KAv

Edited Jul 30, 2020 by matograine

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always display pubkey with checksum