improve compute-balance output

[alokmenghrajani]

We should go back to showing something like this:

+---------------+--------------------+-------------------+---------------------+-------+
| TOTAL BALANCE | LAST RECEIVE INDEX | LAST CHANGE INDEX |     REPORT TIME     | BLOCK |
+---------------+--------------------+-------------------+---------------------+-------+
|        123456 |                 28 |                11 | 26 Sep 18 13:38 PDT | 12345 |
+---------------+--------------------+-------------------+---------------------+-------+