Sort error set in the text report



#### Proposal
Since the Status codes are sorted in the text report, the error set can also be sorted:
```
Status Codes  [code:count]                      200:1982  400:5  404:393  500:20  
Error Set:
404 Not Found
500 Internal Server Error
400 Bad Request
```

#### Background

To improve visual readability

#### Workarounds

NA