> Follows https://git.duniter.org/clients/python/silkaj/issues/41 - [x] Check there is enough money on the pubkey before displaying the resuming transaction chart - [x] #120 Display in the confirmation chart pubkey’s balance before and after the transaction. - [x] #118 Use same function to get pubkey’s balance. - [x] Use one method to retrieve sources, pubkey’s balance (there is two currently)