List of bugs in export_transfers

[kevcrumb]

Related to monero-project/monero-gui#3554 and #4236, this is an overview of problems with CLI's export_transfers:

1. Do you really want to export tx_key? even when no export of tx_keys requested (i.e. without option=with_keys)
2. help misleadingly indicates option=<with_keys> (should actually be option=with_keys)
3. transactions with multiple recipients cause one bad line with mostly empty fields per additional recipient (should be one line per recipient)
4. "running balance" is wrong, at least when not exporting to entire history and also seems to somehow be relative to monero max supply (??)
5. if description as set per set_tx_note contains a comma, it will become a new field (fields should be quoted as is done with the input field)
6. exports should contain a column "total" (amount+fee ; maybe in the first "amount" column at current field 5)
7. Trezor requests confirmation for every single tx key (60 records = roughly 60 seconds of button pressing; should be once for entire operation)