history: Pubkeys display issue with multisig txs

Very specific issue, very low priority :-)

Using history command on the GTest account AhRMHUxMPXSeG7qXZrE6qCdjwK9p2bu5Eqei7xAWVEDK.

Sending multi-receiver tx has a nice display :

+---------------------+------------------------------------------------------------------------------------------------------------------------+---------------+-----------------+------------------+
| 2020-04-24 15:12:42 | Total                                                                                                                  | -618.0        | -0.03           | G1Don            |
|                     | hGQhtJuxNyLAoLkNk2                                                                                                     | -103.0        | -0.01           |                  |
|                     | 8Bg5D9TXoJSwZpJKfo                                                                                                     | -103.0        | -0.01           |                  |
|                     | D5J3ZEKSHLrdCsskVk                                                                                                     | -103.0        | -0.01           |                  |
|                     | 3TJVyePrqtJt5F6Z7a                                                                                                     | -103.0        | -0.01           |                  |
|                     | APybrmPs6BrSF3wH33                                                                                                     | -103.0        | -0.01           |                  |
|                     | BoAUwYrNdpgC7UZvAd                                                                                                     | -103.0        | -0.01           |                  |
+---------------------+------------------------------------------------------------------------------------------------------------------------+---------------+-----------------+------------------+

However, receiving multi-issuer tx "adds" the shortened pubkeys together, and makes it unreadable:

+---------------------+------------------------------------------------------------------------------------------------------------------------+---------------+-----------------+------------------+
| 2020-04-24 15:12:42 | hGQhtJuxNyLAoLkNk28Bg5D9TXoJSwZpJKfoD5J3ZEKSHLrdCsskVk3TJVyePrqtJt5F6Z7aAPybrmPs6BrSF3wH33BoAUwYrNdpgC7UZvAd           | 618           | 0.035           | G1Don            |
+---------------------+------------------------------------------------------------------------------------------------------------------------+---------------+-----------------+------------------+

multisig txs is only implemented on the alpha "Ğ1Don" generator, so this issue has very low priority for now.