a toggle to see variant id's in the matrix view (or not)

[jazdrv]

currently, this is the default:

./redux.py -m

+--------------------------------------------------------------------------------------------------------------------------------------------------------+
| c       p       v           510668  293507  521793  163973  120386  22654  N4826  122898  B30884  124134  637069  499807  5962  224096  216600  177312 |
+--------------------------------------------------------------------------------------------------------------------------------------------------------+
|                               0       1       2       3       4       5      6      7       8       9       10      11     12     13      14      15   |
|                                                                                                                                                        |
| 0    8928037    U106          1       1       1       1       1       1      1      1       1       1       1       1      1      1       1            |
| 1    56832889   BY26835       1       1       1       1       1       1      1      1       1       1       1       1      1      1                    |
| 2     13450     714196        1       1       1       1       1       1      1      1       1       1       1       1      1              1            |
| 3    2781435    BY28649       1       1       1       1       1       1      1      1       1       1       1       1      1                           |
| 4    20076431   BY28694       1       1       1       1       1       1      1              1       1       1       1      1              1            |
| 5    10851110   BY27063       1       1       1       1       1       1      1      1       1       1       1       1                                  |
| 6    20100744   BY28701       1       1       1       1       1       1      1      1       1               1       1      1                           |
| 7    6766604    Z21           1       1       1       1       1       1             1       1       1       1       1             1                    |
| 8    20135984   BY28721       1       1       1       1       1       1      1              1               1       1      1                           |
| 9    19538924   Z28           1       1       1       1       1       1             1       1       1       1       1                                  |
| 10   19647958   700005        1       1       1       1       1       1      1              1       1       1                                          |
| 11   20274347   BY28725       1       1       1       1       1       1      1              1               1              1                           |

the variant pos's are shown in the 2nd col. I'm thinking a toggle would be nice ... or perhaps a config.yaml setting ... so that you could toggle that column into showing variant id's instead.