multisig sign -k does not read config.toml

`multisig broadcast` states:
```
-k, --key string name of the local multisig key name, flag overrides the config
```
`config.toml` states:
```
[[keys]]
# 2/4 (af,eb,gs,mc), ceph val oper standard
name = "ceph-main"
localname = "cec_2of4_multisig"
address = "ixo1x20lytyf6zkcrv5edpkfkn8sz578qg5s2g53ty"
```

If I run `multisig sign` without `-k` it fails but if I run it with `-k cec_2of4_multisig` it succeeds. I believe `-k` should get the data from the `localname` config if it is not defined.