Not sure whether the ID column makes sense in show output

The show alerts table looks like this :

```
wavectl show alert
ID NAME STATUS SEVERITY
1523082347619 Kubernetes - Node Network Utilization - HIGH (Prod) CHECKING WARN
1523082347824 Kubernetes - Node Cpu Utilization - HIGH (Prod) CHECKING WARN
1523082348005 Kubernetes - Node Memory Swap Utilization - HIGH (Prod) SNOOZED WARN
...
```

The dashboard summary looks like this

```
$ wavectl show dashboard --match "env=live"
ID NAME DESCRIPTION
metadata-php Metadata PHP Monitors for Metadata in the PHP webapp
octoproxy Skynet Octoproxy One look summary about the load balancer
skynet-kube-box-pki SKYNET KUBE BOX PKISomeNameToBeMachedInKubeBoxPki Info about PKI system.
```

Assuming that we implement #7 then I do not think the ID column adds any value.
The link will be visible in the summary table too. The Id then looks like an implementation detail.