Improve readability of ticket wining probability

The current field showing the wining ticket probability expects the user to understand the value. Instead of showing a value of:
```
"Minimum ticket winning probability: 0.000005000"
```
It could be shown as:
```
"Minimum ticket winning probability: 0.000005000 -> aprox. 5 winning tickets over 1 million tickets/packages relayed"
```


@thewanderingeditor Can you improve the message?